In the book Cosmic, Liam is reading a book called Talk To Your Teen. Here is what I would add to the book.
Don’t allow your child to have caffeine after seven, because of experience, I found out that you can’t sleep well. Sleep is very important, especially for school. Without sleep it is hard to concentrate and your child won’t have the energy they need. Also, caffeine filled drinks usually have sugar in them. Too much sugar can be very bad for your child. Don’t restrict your child from having caffeine every once in a while though. If your child disobeys, then you should probably reconsider how much you let them have caffeine.