To milk / ちちしぼり

I go to nursery school recently to volunteer. Look this picture! It's a very good idea. Teachers made a tiny hole. And then,the kids milked like a farmer. I can see a lot of toys which I've never seen a lot and... Their program is very organized , so I want to learn more how they do it here. When I play with kids, I can see a lot of things which I already knew like a new things and I can enjoy a lot with just a little thing. I really respect kids.