Ping Pong Ball Planetary Gear

You can find a video about this here https://youtu.be/Po0bZfzQnPU
to finsih it you will need 3 x ping pong balls though i have included the stl for them if you want to print balls instead. You will also need 2 thrust washers at 42mm by 11mm by 25mm and one spring 14mm by 30mm