Small electric car, open CAD.
You will need :
3 wheels Ø25
2 screws shaft (M3)
1 electric motor ~Ø24 (not very fast)
Transmission system (I use archimede's screw with gear wheel) => Photo
10 screws (M3)
3 electric batteries (LR6, AAA)
Wires and switch
Do not hesitate to share your comments, enjoy!