The Leventhal-Sidman Jewish Community Center (333 Nahanton Street) in Newton will offer an eight-week Baby Bootcamp class on Tuesdays, November 1-December 20 from 9:15-10am.  Use resistance bands, weights, your stroller and even your own child for cardio drills, strength training exercises, core work, and stretching. All fitness levels welcome. Geared for parents with babies (3-12 months) who are not walking or who are able to stay in stroller seat for 45 minutes. Cost is $168. Register online at www.bostonjcc.org/register. A free demo class will be held on Tuesday, October 25 at 9:15am. RSVP to wellness@jccgb.org. For more information, contact 617-558-6459 or wellness@jccgb.org.