I got this wooden clock for Christmas a while ago: https://smile.amazon.com/ROKR-Mechanical-Building-Supplies-Best-Birthday/dp/B07HSZ9LYJ/ref=mp_s_a_1_5?crid=14

I got this wooden clock for Christmas a while ago: https://smile.amazon.com/ROKR-Mechanical-Building-Supplies-Best-Birthday/dp/B07HSZ9LYJ/ref=mp_s_a_1_5?crid=14TB49Y2YCNVG&keywords=rokr+clock&qid=1651684699&sprefix=rokr+clock%2Caps%2C147&sr=8-5 https://smile.amazon.com/ROKR-Mechanical-Building-Supplies-B... Definitely helped me to understand how clocks work. And it’s fun to watch it.