Find something that has a lot of parts. Legos come to mind. See how tall you can build your whatever-materials-you-have-found before it collapses. Take a photo of your tower or, better yet, make a stop-motion video of the building of your tower. Bonus points for using fruits and veggies. Triple bonus points if you stack cats.
flickr photo by Boulder Public Library https://flickr.com/photos/boulderlibrary/17162148375 shared under a Creative Commons (BY-NC-SA) license