I found this by chance, searching around the games on the Amazon site, and bought this one to try to help two of my students who avoid math at all costs. Truthfully, some of the cards are pretty challenging and are better for older students. However, the illustrations are colorful and inviting and I've had a lot of success introducing the game to students of all ages. At every age they focus on different things, which is completely appropriate.
I actually use it more often in my ESL classes. As everything's written in English it's a perfect alternative to the same old games usually played in ESL classes. It's a great ten-minute ending game. It leaves the students feeling good about themselves and with a sense of fun about the class.
I actually don't use the die included in the game. I find it better to ask them questions I'm pretty sure they'll be able to answer. (The point, really, is to have fun, no?, not to have them feel foolish and inadequate!) Then, with the students with better memories I can keep asking.
I'm probably going to order The World box, but this one is really valid and fun if you want to challenge your students or children in many different ways!