[wruza]

Idk where I found these. Not 3d though, just stereoscopic 2d. Tetris may be nice for stereo-training, as it doesn't involve any complex movements. But it was harder to me than seeing stills.

http://www.hidden-3d.com/games_stereogram_tetris.php

http://www.hidden-3d.com/stereogram_games.php