Sum dog is so fun. There is 8 free math games in sum dog. I like sum dog 🙂 I hope you do too! Here is a link to the sumdog site. Sumdog is great fun 🙂 My favourite game in sumdog is the ruby game. In the ruby game there is a sum at the bottomof the game. There is numbers on the people trying to get you and you click on the right anser.