Car, Trucks, Train shape sorting puzzle

My 3 year old couldn't wait to get his hands on this puzzle when he saw me making this. The puzzle pieces and the the puzzle board is all the same wood, so the grain can be seen throughout the peices and into the wood around the peices. The back of the puzzle is made of baltic birch ply wood.
All non toxic paint and sprayed with a light finish. The shapes in this puzzle fit exactly, so it's a little tough for hands younger than 3.