Help Sonic save his friends from the evil clutches of Dr. Eggman! Race through different zones as you answer math questions and collect gold rings to rescue Sonic's friends! Leapster2 players can connect online for extra activities and rewards. And with the LeapFrog® Learning Path, parents can see what their child is learning. Appropriate for ages 4 years to 8 years. Works only with Leapster and Leapster2 learning game systems.