cardboard tubes + box = hours of fun! We pieced together TP and paper towel tubes. Used marbles. The kiddo loved it and even still pulls it out to roll the marbles into a dump truck. He wont' let me toss any cardboard tubes now.
The Paperpod Rocket is a fantastic resource to encourage role-play and stimulate your child's imagination. Your young astronauts can decorate both inside and out before zooming off to distant planets to enjoy their own space adventure.