Shoebox lid & craft sticks- these are wide ones, and low temp glue gun. Endless fun and all you need is a shoe box lid and Popsicle sticks! Build a marble run or "Plinko" with all kinds of different creative designs via Frugal Fun For Boys
could do bug obstacle course DIY American Ninja Warrior Backyard Obstacle Course - Five different elements. Build and re-build this obstacle course, and then it breaks down for storage. Storage ideas in the post.
Glittering Popsicle Stick Christmas Trees - These popsicle stick Christmas trees are SO EASY to make and they're so beautiful! The kids loved decorating them! Such an awesome dollar store Christmas craft idea!