We bought Genius kit after hearing about it since long from kid's school and our friends who has the product. After playing with the product along with my daughter, I would highly recommend it and think it is every penny worth at the price $99.99. Though there are a lot of learning games in the market which allows kids to learn basic mathematics and practice it; I think this one is unique because it never makes them glued to the screen. As far a kid is concerned, it's like they are playing with chips of a board game or using a pen to draw and competing to finish the challenges thrown by the screen. That is so cool!
Of all the games, I loved the Numbers game. I can't think about a better way to teach kids addition and subtraction and that too at a mental math level. Osmo team has figured out a way to make the kids relate addition to "bring units together" and subtraction to "separate out units". That's precisely what it is and since the idea is hit at such a basic level, kids are easily able to grasp the concepts. I would highly recommend all parents to play these games along with the kids and gently let them understand that the things they are doing in Numbers game is nothing but the "boring" addition and subtraction they learn at their school. I have seen this really motivating my daughter who has now started using the mental calculation idea back at school while doing the same. In my opinion, this the best way to derive unbelievable value out of this product. You just need to do it a couple of times, your child will take it up from there. Similarly, found the Words game a good way to improve spellings and vocabulary. Osmo has lot more libraries on their My Osmo portal. Make sure you sign up while doing registration and download these libraries.