How to Build Robot Toys?

1.
step 1

Scout around your attic, your garage or the depths of your closets. Think about what may be salvaged from another source that can be used in your robot toy and concurrently save you money. Pay particular attention to remote-control (RC) cars, since these contain a number of the components needed in the base design of a robot toy.
2.
Step 2

Locate and extract a receiver-and-controller combination, two servos and a battery for your robot toy. Your battery should be a nickel-cadmium battery, or at least a lead-acid based one. The receiver and controller that will communicate with your robot toy should allow for at least four degrees of movement (up-down, left-right), but preferably six.
3.
Step 3

Salvage a moderate-size wheel base. One way to do so is to strip the plastic pieces off an old RC car, leaving only the wheel base exposed. Take two pieces of Velcro and attach them to this wheel base using professional-strength glue.
4.
Step 4

Pick up your battery and attach it to the bottom of your wheel base with the Velcro. Similarly, attach the receiver to the top Velcro piece in the same fashion.
5.
Step 5

Use dual-lock tape and fasten the two servos onto your wheel base. These servos should be located on opposite sides of the base from each other, near the perimeter/wheels.
6.
Step 6

Wire together your components by leading all the wires from each component to the receiver. Your receiver will have open channels on the end of the device. Take the wire lead from the battery, which should be a three-wire lead, and attach it to the channel listed as "Batt" or "Battery." Make similar connections by leading the two servos to the receiver and its channels. If the channels are all unmarked, just make sure the servos are connected in directly adjacent channels and that the battery is attached farther away on the receiver.
7.
Step 7

Add any utility or decorative items to your robot toy as you please. As it is, you have the basis for your robot toy, and it is fully functional. Use your imagination from here. If you desire a fun toy, attach decorative items (such as old items salvaged from action figures) with professional-strength glue. Or for a more useful robot, consider using cord to strap on a small broom head or dusting pan to the toy.