A common vehicle at construction sites, the Power Shovel/Dozer kit moves like its full-scale counterpart. The 3-channel remote system enables forward/reverse and left/right movement and it also raises the shovel up and down.
We have a bunch of power supplies laying around. This is a bag of 5 randomly selected power supplies (wall warts). 110VAC input. About 6 inches of wire with no ends. If you need a power supply (wall wart), you can't beat this deal.