How to spend a dollar

I gave Hayden a 5-dollar bill at the baseball fields and told him he could spend $1 at the concession stand and to make sure he brought me the change. He returned with a slice of pizza, 6 pieces of gum, 2 ring pops, and an air head. He handed me $1.75 change. Needless to say, my purse is now full of treats he was not allowed to eat. I think I am going to: 1. quit bringing money to the ballfields or 2. only carry dollar bills.