Self Winding Propeller & Spinning Top Toy

I designed this for my three years old son to be able to play with it without getting any help. (But I still advice you to let the kids play under your supervision only.) That's why it is tiny but it's still easy to hold for a grown-up too.

There are slim and fat versions. You can choose between them depending on the string you will use.

No Support is needed for any of the parts. But i advice using brim for most of them since the parts are small.

Non-printed parts:

1. Rubber band
2. About 45-65 cm long string
3. A pair of tweezers if you don't print the assemly tool included among the files

I used the propeller from https://makerworld.com/en/models/93385-toroidal-launcher-high-rpm-propeller-launcher?from=search#profileId-99949 because i already had some lying around and they are nice propellers.

Assembly Video:

Known issue(s):

• Sometimes, especially when i pull the string too fast, it gets stuck. I believe the reason is the heat caused by friction leads the body and the shaft to stick to each other. A little force on the shaft is enough to restore the self winding function.

I'm open for any ideas to improve the design. Have fun!