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
Teach constellation patterns- print, cut out the circles. punch holes in dots and tape circle to the end of a TP roll. Look through the roll to see the constellation! Shine flashlight through in dark and display constellation on a wall.