 Scientists agree that the only reason adults have children is so they have a socially acceptable reason to visit amusement parks, novelty pizza arcades, and movies with Shreks in them. Put some fun in the oven with today's kid-friendly Groupon: for $65, you get a three-class sampler and two Playspace passes to Kidville (a $240 value). You will also receive half off one child's haircut, a 15% discount at any Kidville boutique, and 15% off lunch at the Kidville Café at the Upper East Side location until the Groupon expires. Today's deal may be used at eight Kidville locations: Upper East Side, Little Maestros at 69th Street, Upper West Side, Tribeca, Midtown West, Park Slope, Scarsdale, and Hoboken. Kidville is a colorful, fun, and educational stomping ground where children can expand their minds, get out their wiggles, and make new, nonimaginary friends. Babies, toddlers, and children under 5 years old will get to attend three class sessions ($136 value) that have been carefully designed by early-childhood-development specialists. Hundreds of stimulating choices await young munchkins' eager eyes and ears, such as the Little Maestros music course and the energetic Run, Wiggle, Paint & Giggle class. My Big Messy Art Class lets your children Picasso to their heart's content with paints, chalks, and crayons, leaving your freshly painted hallways and furniture completely art-free. The fit-and-friendly gym classes, including Big Muscle Playtime and Kidville Tumblers, allow kids to romp amid a bevy of colorful and squishy play mats. Classes may vary at each location, so check the schedule to confirm offerings. You'll also receive two passes ($28 value) to Kidville's state-of-the-art indoor Playspace and the magical outdoor playgrounds at select locations. Get half off your tyke's next new 'do in the hyperfun Kidville Salon (regularly $24) at the Upper West Side location. Child-friendly stylists will sculpt unruly mop tops as kids faux fly an airplane, dream drive a fire truck, or stationarily play PlayStation on a flat-screen TV. Kidville's annual registration fee ($76 value) is included in the price of this Groupon and remains active for a full year. You'll also be entitled to receive a 15% discount at any Kidville toy-and-fashion boutique, and can refuel for 15% off at the Kidville Café in the Upper East Side location. Keep your little ones active until elementary school bombards them with Brontë novels and philosophical debates with a visit to Kidville. This deal can be used for any 45- to 60-minute class. Some classes require adult accompaniment. Children under 3 are required to be accompanied by an adult.  | Choose from eight locations |  | Sample three stirring classes |  | Two Playspace passes |  | 15% off at retail stores & café | |