We love these Dino Bots - initially discovered at my son's preschool last year. Well made, sturdy, don't break, better than transformers for sure!! Plus they are learning numbers :) Five numbers fit together to make a huge robot. Bought the big pack of 10 numbers for my son at Xmas and then 1-5 for my son's friend's birthday only to discover these come in very cool plastic containers that stack like Lego - my son was obsessed and starting begging to swap with his friend!! Great quality product, love that we were able to buy from an Australian company too.