By age 8, John Stuart Mill had learned Latin and Greek, and had written a political treatise barring those with no knowledge of Latin or Greek from his tree house. Enliven your child's mind with today's Groupon: for $22, you get $45 worth of any kids' classes at Learning Advantage Education Center and Preschool in Lyndhurst.

Learning Advantage Education Center and Preschool's licensed, certified teachers impart valuable skills to children in an entertaining, structured atmosphere. Summer dance camps combine age-appropriate movement instruction with foot-tapping music, fun props, and entertaining themes such as Under the Sea, At the Beach, and Standing Near a Sink. Dancers age 5–8 can bounce around at the Shake Your Groove Thing camp ($40, plus a $5 supply fee), and those age 3–4 can groove to music during the three-day Shake, Rattle and Roll camp ($39, plus a $5 supply fee) or the Lets Twist camp ($40, plus a $5 supply fee).

Alternately, youngsters can learn vital defensive and character-building skills during Learning Advantage's self-defense classes. Keep safe with a four-week class for kids age 5–12 on how to handle bullies or sentient pencil sharpeners ($45), an adult-accompanied martial-arts class for tots age 3–5 ($45), and a self-defense curriculum for women older than 18 ($45). This Groupon can also be applied toward the total value of additional classes, such as the Sing and Swing program ($125) or the Karate Kids class ($60).