Lovable Elmo is back for another Game Boy Color game to help preschoolers learn and maybe have a little fun at the same time. The famous Sesame Street character aims to teach four concepts, all centered around mathematics: addition, number correspondence, counting, subtraction and number pattern recognition. Elmo is welcoming visitors from the Planet Zap, but he'll first need some help counting stars so the visitors will turn the lights back on Sesame Street. It's pretty dark out there right now!

The four different games include How Many Stars, Beam That Number, Adding Countdown and Take It Away, Stars! The first game involves counting the number of stars left behind by a streaking spaceship. A list of numbers from one to nine appears along the bottom of the screen, and the object is to match the stars with the corresponding number. Each correct answer will light up a section of Sesame Street; once five patterns are matched, the game ends with Elmo strutting down the street.

Beam That Number has Elmo (with the help of a preschooler) beaming a spotlight over three different patterns. The object is to pick the group that corresponds to the number in the lower right corner of the screen. Succeed three times and you'll get to watch two rockets launch into space! Both addition and subtraction games involve selecting the appropriate number, again from one to nine, to complete the equation presented at the top of the screen.

In the addition game, Elmo will fly along with his jet-pack to offer three equations; answer each one correctly and the game concludes with a single rocket blasting off. The subtraction game also offers three different equations, with each successful answer bringing players one step closer to watching the rocket ship return to Planet Zap. As with Elmo's ABCs, Elmo's 123s is recommended for children ages three to six.