Pre-k and Kindergarten addition of doubles game - Double digit or double place numbers is similar to adding single digit numbers although the challenge could be experienced if students have to add and regroup across places. Adding two place numbers at this level could also be carried out with the aid of counting objects for easy understanding by kids. This is an interactive online hidden pictures game for students to review while having fun. This is a great way to relief students of the pressure of learning math which is sometimes a challenge for some kids. This game is useful for students in kindergarten, 1st , 2nd, and 3rd grades to use for reviewing basic math skills. Click and start reviewing online.