Balloon Tennis... Easy and cheap entertainment! -- 29 of the MOST creative crafts and activities for kids!
Make board activities for smaller kids, store in something like hanging folder or vertical shelf or pin to a wall or ...
2 liter rocket jet pack.
Fine motor Play from Recyclables
Draw outline shapes. Cut out foam shapes to match and attach velcro to both if need be. Can fold to bring along for road trip travel games. G;)
19 Ridiculously Simple DIYs Every Elementary School Teacher Should Know