The toothpaste called peristalsis

I've mentioned before how much I enjoy the Grade Three class this year - their innocence, their delight in learning and just watching them grow, mature and develop keen senses of humour as the year has progressed. Yes, I have my favourites - one is allowed favourites isn't one?

Recently they wrote a test on the digestive system. These were just a couple of their answers:

1. Another name for urine is Wii (In South Africa we say wee. I'm not sure about the term in the rest of the world. But I do feel sorry for that child if (s)he actually has a Nintendo. (S)he'd be thinking every time turning it on, "Hey, this is another name for urine. Eeeeeuwwwwhhhh!)
2. Faeces leave the body by way of the buttocks. (Now, that's just plain funny. Another one said they leave the body by way of the toilet... That shows creativit thinking, when you haven't studied!)
3. Definition of the digestive system: “How the food goes to my bum.” (Well, it may not be technically correct, but it is correct isn't it?)
4. And finally... Peristalsis is: a kind of toothpaste. (Because their teacher used a toothpaste tube to demonstrate how peristalsis works in the intestines. This child could be found shopping with her mother and saying, "Mom, could we buy the 'Peristalsis' brand? My teacher told me about it at school!"

I think in pictures, so this is all I could deal with! Have an excellent day, night, or whatever it is in your part of the world...