123 Order is a LearningPlanet.com game with a train theme that helps children review the number line and learn the order of counting numbers. In this game, your child will be shown the numbers 1 through 10 and will be given a train car containing barrels on it. For example, the barrels will be labeled "2 3 _ " They'll be asked "What comes next?" and should click on the correct answer on the barrels below. You should point out to them that they can find the 2 and 3 barrel below and see which one is next. The focus changes to other groups of numbers as the game progresses. It also has levels where the child will have to select the first or middle number that is missing from the three number sequence.