My kids love glow sticks, so I was really excited to have a chance to try out GlowCicle - basically they're freeze pops with a sleeve for glow sticks. It makes it really fun (although not very practical in the winter). I could definitely see these being a hit for picnics and summer get-togethers.
Right now they're running a Kickstarter campaign to get the product off the ground. If your kids love glow sticks, this would be a fun option for them this summer!