Oh h1 is an addicting and challenging interactive for problem solving and logic. Choose from four different grid sizes to play. Click on squares to make them red or blue. The goal is to never have more than 2 squares of the same color in a row, and to have equal numbers of colors in all rows and columns. The rules are explained as you play. Increase difficulty by increasing the number of grids and completing in the shortest elapsed time.

tag(s): DAT device agnostic tool (147), game based learning (205), logic (161), problem solving (233), puzzles (149)