Conveyor Belt from remmler.org/science/playgroup.html

1. Turn a yogurt-lid-wheel, which turns the pool noodle, that pulls the flannel-conveyor-belt. This version is about 20” long. I'm working on a 5' one, so we can transport mulch up into the playscape.

2. Create a nail hole in a jar lid, by hammering a big nail through it. Remove the big nail, and use a small nail to attach the jar lid to some wood. Pull a rubberband around two jar lids. Turn one jar lid, that pulls the rubberband, that rotates the other jar lid.