http://mrnussbaum.com/speed-math-ipad.html
http://mrnussbaum.com/math-slalom-ipad.html
http://mrnussbaum.com/the-multiplication-zombies-of-the-brittany-graveyard/
multiplayer racen
https://www.digipuzzle.net/minigames/grandprix/grandprix_multiplications_links.htm
Werkt niet op elke computer en ook niet op ipad:
http://www.multiplication.com/games/play/road-rally-multi-player-multiplication
