Sunshine Cupcakes

I made sunshine cupcakes for a party we went to on Sat. The theme was Fun in the Sun and I thought these guys would brighten up the kids' day.
I had been wanting to try Wilton's edible markers. It made adding a smile so easy. I will have to try them again. I am wondering if they work well on sugar cookies. You could make some fun and detailed designs on Christmas cookies this way. Could I really be thinking about Christmas in July?