diff --git a/TrueCraft.API/Logic/IBlockProvider.cs b/TrueCraft.API/Logic/IBlockProvider.cs
index 85e24a4..ed2d0fd 100644
--- a/TrueCraft.API/Logic/IBlockProvider.cs
+++ b/TrueCraft.API/Logic/IBlockProvider.cs
@@ -21,6 +21,7 @@ namespace TrueCraft.API.Logic
         ToolType EffectiveTools { get; }
         string DisplayName { get; }
         BoundingBox? BoundingBox { get; } // NOTE: Will this eventually need to be metadata-aware?
+        BoundingBox? InteractiveBoundingBox { get; } // NOTE: Will this eventually need to be metadata-aware?
         Tuple<int, int> GetTextureMap(byte metadata);
         void GenerateDropEntity(BlockDescriptor descriptor, IWorld world, IMultiplayerServer server, ItemStack heldItem);
         void BlockLeftClicked(BlockDescriptor descriptor, BlockFace face, IWorld world, IRemoteClient user);
diff --git a/TrueCraft.Client/Modules/HighlightModule.cs b/TrueCraft.Client/Modules/HighlightModule.cs
index 5934d85..d229296 100644
--- a/TrueCraft.Client/Modules/HighlightModule.cs
+++ b/TrueCraft.Client/Modules/HighlightModule.cs
@@ -90,8 +90,8 @@ namespace TrueCraft.Client.Modules
         public void Update(GameTime gameTime)
         {
             var direction = XVector3.Transform(XVector3.UnitZ,
-                Matrix.CreateRotationX(MathHelper.ToRadians(Game.Client.Pitch)) *
-                Matrix.CreateRotationY(MathHelper.ToRadians(-(Game.Client.Yaw - 180) + 180)));
+            Matrix.CreateRotationX(MathHelper.ToRadians(Game.Client.Pitch)) *
+            Matrix.CreateRotationY(MathHelper.ToRadians(-(Game.Client.Yaw - 180) + 180)));
 
             var cast = VoxelCast.Cast(Game.Client.World,
                 new TRay(Game.Camera.Position, new TVector3(direction.X, direction.Y, direction.Z)),
@@ -101,10 +101,21 @@ namespace TrueCraft.Client.Modules
                 Game.HighlightedBlock = -Coordinates3D.One;
             else
             {
-                Game.HighlightedBlock = cast.Item1;
-                Game.HighlightedBlockFace = cast.Item2;
-                HighlightEffect.World = DestructionEffect.World =
-                    Matrix.CreateTranslation(new XVector3(cast.Item1.X, cast.Item1.Y, cast.Item1.Z));
+                var provider = Game.BlockRepository.GetBlockProvider(Game.Client.World.GetBlockID(cast.Item1));
+                if (provider.InteractiveBoundingBox != null)
+                {
+                    var box = provider.InteractiveBoundingBox.Value;
+
+                    Game.HighlightedBlock = cast.Item1;
+                    Game.HighlightedBlockFace = cast.Item2;
+
+                    DestructionEffect.World =
+                        Matrix.CreateTranslation(new XVector3(cast.Item1.X, cast.Item1.Y, cast.Item1.Z));
+                    HighlightEffect.World = Matrix.Identity
+                        * Matrix.CreateScale(new XVector3((float)box.Width, (float)box.Height, (float)box.Depth))
+                        * Matrix.CreateTranslation(new XVector3((float)box.Min.X, (float)box.Min.Y, (float)box.Min.Z))
+                        * Matrix.CreateTranslation(new XVector3(cast.Item1.X, cast.Item1.Y, cast.Item1.Z));
+                }
             }
         }
 
diff --git a/TrueCraft.Client/VoxelCast.cs b/TrueCraft.Client/VoxelCast.cs
index f9e410b..1e1c4a9 100644
--- a/TrueCraft.Client/VoxelCast.cs
+++ b/TrueCraft.Client/VoxelCast.cs
@@ -35,7 +35,7 @@ namespace TrueCraft.Client
                         if (id != 0)
                         {
                             var provider = repository.GetBlockProvider(id);
-                            var box = provider.BoundingBox;
+                            var box = provider.InteractiveBoundingBox;
                             if (box != null)
                             {
                                 BlockFace _face;
diff --git a/TrueCraft.Core/Logic/BlockProvider.cs b/TrueCraft.Core/Logic/BlockProvider.cs
index 7891254..ee4544d 100644
--- a/TrueCraft.Core/Logic/BlockProvider.cs
+++ b/TrueCraft.Core/Logic/BlockProvider.cs
@@ -271,6 +271,14 @@ namespace TrueCraft.Core.Logic
             }
         }
 
+        public virtual BoundingBox? InteractiveBoundingBox
+        {
+            get
+            {
+                return BoundingBox;
+            }
+        }
+
         /// <summary>
         /// Gets the time required to mine the given block with the given item.
         /// </summary>
diff --git a/TrueCraft.Core/Logic/Blocks/CropsBlock.cs b/TrueCraft.Core/Logic/Blocks/CropsBlock.cs
index fb84222..3e92c04 100644
--- a/TrueCraft.Core/Logic/Blocks/CropsBlock.cs
+++ b/TrueCraft.Core/Logic/Blocks/CropsBlock.cs
@@ -24,7 +24,15 @@ namespace TrueCraft.Core.Logic.Blocks
         
         public override string DisplayName { get { return "Crops"; } }
 
-        public override TrueCraft.API.BoundingBox? BoundingBox { get { return null; } }
+        public override BoundingBox? BoundingBox { get { return null; } }
+
+        public override BoundingBox? InteractiveBoundingBox
+        {
+            get
+            {
+                return new BoundingBox(Vector3.Zero, new Vector3(1, 3 / 16.0, 1));
+            }
+        }
 
         public override Tuple<int, int> GetTextureMap(byte metadata)
         {
diff --git a/TrueCraft.Core/Logic/Blocks/DandelionBlock.cs b/TrueCraft.Core/Logic/Blocks/DandelionBlock.cs
index d22f73b..5908371 100644
--- a/TrueCraft.Core/Logic/Blocks/DandelionBlock.cs
+++ b/TrueCraft.Core/Logic/Blocks/DandelionBlock.cs
@@ -22,6 +22,14 @@ namespace TrueCraft.Core.Logic.Blocks
 
         public override BoundingBox? BoundingBox { get { return null; } }
 
+        public override BoundingBox? InteractiveBoundingBox
+        {
+            get
+            {
+                return new BoundingBox(new Vector3(4 / 16.0, 0, 4 / 16.0), new Vector3(12 / 16.0, 8 / 16.0, 12 / 16.0));
+            }
+        }
+
         public override bool Flammable { get { return true; } }
 
         public override Tuple<int, int> GetTextureMap(byte metadata)
diff --git a/TrueCraft.Core/Logic/Blocks/DeadBushBlock.cs b/TrueCraft.Core/Logic/Blocks/DeadBushBlock.cs
index 41d5f32..49dd479 100644
--- a/TrueCraft.Core/Logic/Blocks/DeadBushBlock.cs
+++ b/TrueCraft.Core/Logic/Blocks/DeadBushBlock.cs
@@ -22,6 +22,19 @@ namespace TrueCraft.Core.Logic.Blocks
 
         public override BoundingBox? BoundingBox { get { return null; } }
 
+        public override BoundingBox? InteractiveBoundingBox
+        {
+            get
+            {
+                return new BoundingBox(new Vector3(4 / 16.0), Vector3.One);
+            }
+        }
+
+        public override Coordinates3D GetSupportDirection(BlockDescriptor descriptor)
+        {
+            return Coordinates3D.Down;
+        }
+
         public override Tuple<int, int> GetTextureMap(byte metadata)
         {
             return new Tuple<int, int>(7, 3);
diff --git a/TrueCraft.Core/Logic/Blocks/LadderBlock.cs b/TrueCraft.Core/Logic/Blocks/LadderBlock.cs
index 22bafae..0565000 100644
--- a/TrueCraft.Core/Logic/Blocks/LadderBlock.cs
+++ b/TrueCraft.Core/Logic/Blocks/LadderBlock.cs
@@ -36,6 +36,14 @@ namespace TrueCraft.Core.Logic.Blocks
 
         public override BoundingBox? BoundingBox { get { return null; } }
 
+        public override BoundingBox? InteractiveBoundingBox
+        {
+            get
+            {
+                return new BoundingBox(new Vector3(0.25, 0, 0.25), new Vector3(0.75, 0.5, 0.75));
+            }
+        }
+
         public override Tuple<int, int> GetTextureMap(byte metadata)
         {
             return new Tuple<int, int>(3, 5);
diff --git a/TrueCraft.Core/Logic/Blocks/RoseBlock.cs b/TrueCraft.Core/Logic/Blocks/RoseBlock.cs
index 82121dd..1a26d53 100644
--- a/TrueCraft.Core/Logic/Blocks/RoseBlock.cs
+++ b/TrueCraft.Core/Logic/Blocks/RoseBlock.cs
@@ -22,6 +22,14 @@ namespace TrueCraft.Core.Logic.Blocks
 
         public override BoundingBox? BoundingBox { get { return null; } }
 
+        public override BoundingBox? InteractiveBoundingBox
+        {
+            get
+            {
+                return new BoundingBox(new Vector3(4 / 16.0, 0, 4 / 16.0), new Vector3(12 / 16.0, 8 / 16.0, 12 / 16.0));
+            }
+        }
+
         public override Tuple<int, int> GetTextureMap(byte metadata)
         {
             return new Tuple<int, int>(12, 0);
diff --git a/TrueCraft.Core/Logic/Blocks/SaplingBlock.cs b/TrueCraft.Core/Logic/Blocks/SaplingBlock.cs
index 6b7e4ac..b6cd475 100644
--- a/TrueCraft.Core/Logic/Blocks/SaplingBlock.cs
+++ b/TrueCraft.Core/Logic/Blocks/SaplingBlock.cs
@@ -29,6 +29,14 @@ namespace TrueCraft.Core.Logic.Blocks
 
         public override BoundingBox? BoundingBox { get { return null; } }
 
+        public override BoundingBox? InteractiveBoundingBox
+        {
+            get
+            {
+                return new BoundingBox(new Vector3(1 / 16.0, 0, 1 / 16.0), new Vector3(14 / 16.0));
+            }
+        }
+
         public override Tuple<int, int> GetTextureMap(byte metadata)
         {
             return new Tuple<int, int>(15, 0);
diff --git a/TrueCraft.Core/Logic/Blocks/SnowBlock.cs b/TrueCraft.Core/Logic/Blocks/SnowBlock.cs
index 30d1989..4f0f3c4 100644
--- a/TrueCraft.Core/Logic/Blocks/SnowBlock.cs
+++ b/TrueCraft.Core/Logic/Blocks/SnowBlock.cs
@@ -71,7 +71,21 @@ namespace TrueCraft.Core.Logic.Blocks
 
         public override string DisplayName { get { return "Snow"; } }
 
-        public override TrueCraft.API.BoundingBox? BoundingBox { get { return null; } }
+        public override BoundingBox? BoundingBox { get { return null; } }
+
+        public override BoundingBox? InteractiveBoundingBox
+        {
+            get
+            {
+                // TODO: This is metadata-aware
+                return new BoundingBox(Vector3.Zero, new Vector3(1, 1 / 16.0, 1));
+            }
+        }
+
+        public override Coordinates3D GetSupportDirection(BlockDescriptor descriptor)
+        {
+            return Coordinates3D.Down;
+        }
 
         public override Tuple<int, int> GetTextureMap(byte metadata)
         {
diff --git a/TrueCraft.Core/Logic/Blocks/TallGrassBlock.cs b/TrueCraft.Core/Logic/Blocks/TallGrassBlock.cs
index 2ade6bf..a2dec16 100644
--- a/TrueCraft.Core/Logic/Blocks/TallGrassBlock.cs
+++ b/TrueCraft.Core/Logic/Blocks/TallGrassBlock.cs
@@ -32,6 +32,14 @@ namespace TrueCraft.Core.Logic.Blocks
 
         public override BoundingBox? BoundingBox { get { return null; } }
 
+        public override BoundingBox? InteractiveBoundingBox
+        {
+            get
+            {
+                return new BoundingBox(new Vector3(4 / 16.0), Vector3.One);
+            }
+        }
+
         public override Coordinates3D GetSupportDirection(BlockDescriptor descriptor)
         {
             return Coordinates3D.Down;
diff --git a/TrueCraft.Core/Logic/Blocks/UprightSignBlock.cs b/TrueCraft.Core/Logic/Blocks/UprightSignBlock.cs
index a5a1b9b..97bba24 100644
--- a/TrueCraft.Core/Logic/Blocks/UprightSignBlock.cs
+++ b/TrueCraft.Core/Logic/Blocks/UprightSignBlock.cs
@@ -27,6 +27,14 @@ namespace TrueCraft.Core.Logic.Blocks
 
         public override BoundingBox? BoundingBox { get { return null; } }
 
+        public override BoundingBox? InteractiveBoundingBox
+        {
+            get
+            {
+                return new BoundingBox(new Vector3(6 / 16.0, 0, 6 / 16.0), new Vector3(10 / 16.0, 10 / 16.0, 10 / 16.0));
+            }
+        }
+
         public override Tuple<int, int> GetTextureMap(byte metadata)
         {
             return new Tuple<int, int>(4, 0);