2x – small 1.5 Volts motors
2x – small paperclips
2x – big paperclips
2x – batteries AAA or AA
1x – battery holder AAA or AA
1x – 2 cm of heat shrink
1x – wooden pearl  (for the caster)
1x – meter of electric wire
2x – Sub-mini lever SPDT switches
Posted By
Sunil Jumle
Btech(ECE)