Swim instructors Santino Gambardella, right, and Sophia Franchi, middle, lead a group of children in the Aqua Tots swim class for children ages 3 and 4 at Lake Quonnipaug. Guilford Parks and Recreation offers classes in age appropriate groups up through age 7 with a second session slated for July 30 through August 13. For more information visit guilfordparkrec.com .