Madlab Electronic Kit Range - Whadda WSL103, The Whadda WSL103 Atom Heart kit is our Cyberpunk version of the Iron Man® ARC Reactor®. Now you can give your Teddy Bear, or other favourite doll or stuffed animal, their very own Atom Heart. The slits in the PCB (printed circuit board) can be used to attach the kit to anything you want. The light patterns of the Atom Heart can be changed by pushing the button. Whadda WSL103 Madlab Electronic Kit - Atom Heart