One very simple way to save money with kids is to make your own bath paint! It’s very easy and is made of only flour, water, & food dye!! I don’t even have a set amount of any one ingredient to be honest. I just put some food dye in a little tupperware container, add a spoonful of flour, then add some water! Mix it up. If it’s too runny, add more flour. If it’s too thick add more water! Voila! It washes off the shower walls immediately too!