Historians agree that were it not for a childhood birthday-cake explosion, Einstein would never have discovered science. Today's side deal introduces your kid and all his or her friends to the joys of science and crazy hair. For $150, kids ages 4–14 get a 50–60 minute interactive science-experiment birthday party from Mad Science, a $275 value. Your Groupon also includes up to 14 goody bags that include polymer putty, helix flyers, stickers, and more. Mad Science will come to you, but this deal does not include the travel fees (starting at $10, call to check for your location).

Kids will have so much fun launching spinning disks, applying temporary tattoos, mixing their own silly putty, practicing maniacal laughter, and reanimating dead tissue that they'll forget they're learning. The experiments rarely make a mess, and Mad Science will handle any wacky hassle or silly spill. This party does not include experience in the best parts of science: writing grant proposals, ordering test tubes, and dissecting mice with scissors. Upgrades are available by applying the value of the Groupon and paying the additional charges.