With this sorting box, children have twice as much fun! Just like in a real zoo, within every vivarium there is a slide: If pushed down, only the half wood shapes fit through the opening. If pushed upward, the opening is large enough for the whole wood shape. This is fun because as children play, they can pretend to feed the animals while becoming more familiar with color and shape recognition. Includes 8 wooden shapes and 1 sorting box. For ages 12 months+.