DS6 discovered the Fantastic Contraption website. I stuck it in his bookmark folder a few months ago when it was posted here and just let it sit there for him to discover. I didn't even have to show him how it worked, he figured it out all on his own and is on the last level after just a few hours working on it.

I don't know if that's so unusual, but as a completely non-visual spatial person who gave up on the game after level 6 (the asymmetry of my contraptions was too much for me to handle, lol) I was really impressed! I definitely think we'll be investing in the paid version.