How do you put chaos in the chao kindergarten

First pick your chao,by pressing y then b.Go out of the chao garden but still in chao world head across to the place that's says kindergarten.Go to the place that says classroom,go in there by going up to the door and pressing b.Then it will show you what they are learning,and there are there tree chocies.1 leave the chao to learn.2 pick up chao.And three back.