I periodically volunteer at STEM (Science Technology Engineering and Mathematics) events at local events for elementary and middle school kids. This project prints a shaker table that can be used to for students to test a tower that they build. I have them use marshmallows and spegettie to create a structure that is then tested. The kids have great fun doing the project. You can do this in any size groups. I printed out several of the base plates that I hand out to the kids. They then build a tower and see how it performs. Once it is tested they can take it back and modify their design to see if they can improve it. The table is operated using a battery operated hand drill, any brand will work. I have posted on MakerWorld the 3MF file for this project. You will also need two bearings that you can get from amazon.
The original design for this project was created by barty3d and is published on Thingaverse. I modified his files with a 3D printed bushing and 3D printed pins. He used brass and a steel bearing.
MakerWorld Link:
https://makerworld.com/en/models/1275461-shaker-table#profileId-1303199
Bearing link from Amazon:
https://www.amazon.com/dp/B07H83VV6B?ref=ppx_yo2ov_dt_b_fed_asin_title
Let me know if you need any guidance with this project.
