[BookMuncher]

I've done it before where each child had a cup with two reds (morning) and one blue (afternoon) for bathroom breaks. I don't have as many bathroom breaks built in as you, though. Our morning is much longer than the afternoon, thus the two and one. Maybe for your schedule everyone only has one chip for the day? (Really, if you are breaking for the bathroom 4 times a day, they should be fine! But we all know that it doesn't matter how many breaks we take!)