Summary

Impress your kids with this motorized spinning top.
Upper and lower part are bonded together, using a solvent adhesive, double sided adhesive tape or any glue you might have in your drawer.
Since the dimensions of DC motors are not standardized, we will not 3D print a housing, but just tape the motor to a 9 volt block cell and connect them with a battery clip so we don't need a switch.
https://youtu.be/dRGMWIwnHew
Tip: Replace the top section with your own design (see examples).