Beautifully decorated cardboard boxes are perfect for building and learning.  Stack, sort shapes, study the landscapes, or practice counting!
Try stacking the blocks in different orders and see if that affects the puzzles--can you stack the blocks on top of each other from smallest to largest? 
 
Characters made of wood. Blocks made of sturdy cardboard.  Largest block measures 13 H x 13 W x 13cm
 
Ages 18mths+