Vinegar/Baking Powder/Lemon Juice/Milk

There are two things that my son has mentioned are things  that he is working on to get ready for school.

One is jumping.  "You have to jump really far when you go to school."

The other is science.

He earnestly told me more than a few times that he was working on his science projects this week to ready himself for what he anticipates is in store for him at school.