Origami is a little tricky for them because they don't have the dexterity, but with a little help they made origami bookmarks and christmas trees as an activity. They had fun with it. Folded Paper Heart Book Page Marker – DIY
"Building Bristlebots: Basic Toothbrush Robotics": With a bag of toothbrushes and some basic electronics supplies, you can give a group of kids a fun introductory experience! Once you have a crew of working bots, get creative building mazes and tracks!