Fisher Price Baby Smartronics Computer Learning System Includes: Infant (9 months plus) appropriate key topper that fits over your keyboard and a CD-ROM with 3 levels of learning. Bright colors with big keys. Made to be entertaining and at the same time an early computer teaching tool. PC and Macintosh compatible. Key topper fits all standard size keyboards, but may not fit some unique sizes and ergonomic designs. Hands on keyboard sits over standard computer keyboard...nothing to plug in. CD-ROM is three levels...beginner, intermediate and advanced as your baby grows.