I saw Tribbs Lite reviewed on the Appitic site under Multiple Intelligences, and decided to give it a try. For students who love math, this free app for the iPad is a great brain exercise. I am putting it in the Grades 3-12 category because, as an adult, even I found it addictive. My third graders tested it out today, and enjoyed the challenge. Basically, you are given a target number, and have to find three numbers that will make that target number by using any of the operations. The number choices are in a grid, and you have to choose numbers that are neighbors. You get more points the faster and more accurately you solve the puzzle.