The gamebuilder ChallengeYou uses is called aMazer. All you need is the Adobe Shockwave program and you're on your way to creating custom games directly in your web browser. Let your kids imagination run wild where they can create mazes, 3D art, scavenger hunts or whatever they can imagine. ChallengeYou has made game creation simple by including features you just drag and drop. The best part about this whole program, it's FREE!