What a great idea. Make your own I SPY game with a VOSS water bottle. You fill it with rice and drop in little things to hide and then make a list of everything in the bottle for the kiddos to find. This is a great travel activity.
Summer Activity Idea List - indoor and outdoor activities. I realize this is probably meant for little kids, but all of these things sound fun! Doesn't have to do with next year but will be good for this summer!