Super easy box choo-choo train!
4 diaper boxes (or two warehouse size ones cut in half)
pipe cleaners (or rope or yarn, etc)
Cut the top flaps off diaper boxes. If you have two warehouse size boxes, close (and secure with tape/glue) the open end, then cut the box down the middle lengthwise. Poke holes in the ends of the boxes. Thread the pipe cleaners through the holes, then twist them to secure. All aboard!