Check out this cool Wi-Fi Robot, made by Jonathan Bennet from JB Projects.
A remote control car that can be driven over the internet or with a laptop wirelessly from up to 500m away. It has a live-feed network camera so that it can be driven without line of sight and a horn so that you can honk at people. Adding a network camera, router, heavier batteries, extra circuits, and a whole bunch of wires adds a lot of extra weight that the car wasnt designed for. Because of all of the additions, youll need to find a pretty large RC car. Thrift stores often sell RC vehicles (without remotes!) for $3-5. I have bought a number of cars this way for taking apart. Vehicles in the 1:10 size ratio or bigger are appropriate; you probably dont want to go any smaller. I bought this car for $5 at Value Village
Here’s a video of it in action.
JB Projects via Hacked Gadgets