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Every Monday at 10 a.m., there’s a different nature topic to explore at the Caterpillar Club, hosted by the Massachusetts Horticultural Society’s Gardens at Elm Bank in Wellesley. Children from preschool through second grade can drop in to learn about birds or gardening or bees.
Putting its 210 acres to good use, Fruitlands Museum in Harvard hosts dog-friendly, kid-friendly summer concerts on Thursdays at 7 p.m. (Picnic grounds open at 5:30 p.m.)
At Garden in the Woods in Framingham, kids can pick up a scavenger hunt sheet, tailored to their age group, with admission. The Edible Garden and Invasive Plant Jail are also popular with younger visitors.