I've now seen this idea for summer snacks on Simple Mom a couple times now and I am going to try it one of these days! I think its a great idea to make one big snack tray for the afternoon or whatever, I just worry about teeny tiny battles over the good muffin cups. I wonder if its been tried with three kids 4 years old and under?! I usually make each kid their own bowl of a fruit, cookie, nuts and/or cheese after they wake up from their afternoon naps and it can sometimes tide them over for a whole hour! I'll let you know how it goes when I give it a go!