16-rattaga masin: https://www.youtube.com/watch?v=SifpvD2J6Xc
Hammasrataste kasutamise lihtne seletus:https://www.youtube.com/watch?time_continue=13&v=pnFOAz8urDo
Mootorratas: https://www.youtube.com/watch?v=cBpowHDFycE
Robot liigub ülesmäge: https://www.youtube.com/watch?v=mG30Xgy1Dog
Ilma ratasteta robot: https://www.youtube.com/watch?v=qvOyzRrr1dg
Hammasratastest http://www.technicopedia.com/fundamentals.html