Join PJ Library and other Metro North families for a playground meetup at Cambridge Common (36 Waterhouse Street) on Thursday, September 7 from 3:30-5pm. Let the kids blow off a little steam revisiting water and sand one more time as we shift from summer to fall schedules. Bathing suit recommended. Snacks provided. No charge. For families with children ages 2-5 years. Register at bostonjcc.org/pjplaydatesept. For more information, please contact mnfamilies@jccgb.org or 617-841-8009.