I second the listing in the first pots that was found for you, I've only been to the one in Germany, right across the border from Basel (little as a 10-15 minute drive from the border of Basel (Riehen) to Lorrach, Germany. You could naturally take tram 6 all the way down the end of the line and then walk the 10 minutes that it takes to get here (depending on if you have transport or not):
http://www.okidoki-loerrach.de/
Big, they have plenty of space and great deals (plus you can bring in your own food if you wish) - 2 years olds will love it, and there is plenty of stuff for bigger kids too.