In Stoneham, just off of 93N, there is a small zoo, the perfect size for young children. The newest attraction is the addition of a few alligators. The zoo is a good size for a few hours and is open from 10:00- 5:00pm on weekdays, April 1- September 30 and on weekends from 10:00 - 6:00 pm, and the winter hours which run from October 1- March 31, are 10:00 am- 4:00 pm.
Rates are available at the link below.
Stone Zoo Link
The zoo runs daily Birds of Prey shows, has a small gift shop, a food vendor during summer hours, restrooms and a few rides for children.