Remove the batteries from the children's toy and power it directly with a DC power supply.
I slowly increased the voltage to 30 volts and filmed the movement.
** It may be more dangerous than expected. We do not recommend taking this action. **
00:00 Intro
00:36 robot with many legs
02:21 Merrygoround girl
04:22 DJ pig
05:35 parrot imitating
06:52 music box