They came over me with full force. I did not expect them to be this powerful. Hopefully they all lose their energy very soon ... ;-)
Step 1: What you need
out of old pc mainboards I got battery holders and 3V button batteries. Also LEDs or resistors could be sourced out of old electronic parts.
To make the radio controlled mover I bought a bunch of radio controlled mini cars. I got 27Mhz and 40Mhz cars so that I can guide two robots at the same time.