Things have really started hopping over at Massachusetts Horticultural Society with the installation of Ribbit the Exhibit, running through Sept. 7 at The Gardens at Elm Bank. Nineteen whimsical 4 – 7 foot copper frog sculptures depicted by North Carolina artist J.A. Cobb have been placed throughout the 36-acre property. There’s Cora the Local Garden Enthusiast in the Bressingham Garden, gleaming metal watering can in hand; Emerson, A Morning Person, relaxing on a bench with a cup of coffee; Edward the Treefrog, perched in a tree, of course; and the rest of the engaging and amusing crew. Each frog comes with a backstory—just look for the nearby signs.