Cardboard pyramid. 10 stackable elements to recreate a magnificent pyramid : each element must be positioned so that the illustrations match up. As your child stacks the blocks, he or she will discover a magic tree with lots of surprises at each nook and cranny. A number is also written on top of each element. Your child will use this pyramid to learn how to count to 10 and to develop his or her motor skills and imaginations while having fun!