Alexander W. Kemp Playground

If you’re in Cambridge with little ones under seven, this spot is worth knowing about. The water feature and sandbox combo keeps toddlers genuinely busy — like, you’ll be there longer than you planned. There’s a boat-themed climbing structure that’s a bit more interesting than your standard playground equipment, plus the usual slides, swings, tire swing, and seesaw. Shade trees and covered seating mean you’re not just standing in the sun waiting it out. Street parking exists, and there are restrooms on-site, which honestly makes or breaks a trip with small kids.