These are like LEGO kits. Each box has 156 pieces and the models can transform into 3 different structures. My son has all the collection as he loved building. He was 7 to 8 years old when he started building these figures. Boxes have never been opened. This would make a great Christmas or birthday gift! $10 for each box. Ages 6 and up. I live by Hillside Mall. https://produto.mercadolivre.com.br/MLB-1104507890-blocos-de-montar-change-union-391-392-peizhi-_JM