Physicists have determined that the best way to subdue wall-bouncing photons is to let them loose until they need a nap. Apply the latest scientific findings to your kid’s playtime with today’s deal: for $10, you get admission for two, plus four snacks or drinks (a $20 value), at MonkeyTown, a riotous indoor playspace on Marentette Avenue. MonkeyTown is a 3,700-square-foot indoor haven of playdom sporting a variety of playground equipment, themed playrooms, and interactive toys to get kids 7 and under moving and shaking like the toe-tapping railroad tycoons of the 1920s. The play area is covered in mats for safety and maximum napping potential, and a specialty soft play area keeps it cuddly for crawlers and early walkers. Parents are required to chase after their active offspring at all times, and like surgeons and rodeo clowns, must wear socks. Guests are welcome to visit the on-site snack shop for water ($1), juice boxes ($0.75), crackers ($1), fruit crisps ($1), and other forms of brood-fuel. MonkeyTown asks that in consideration of visitors with allergies, no food containing peanuts or pet dander enter the premises.