Grandpa Henry’s Picnic is back at the Oshawa Museum! To celebrate International Museum Day and the unofficial start to summer, the Oshawa Museum is throwing a picnic! On Sunday, May 17, let’s party, Victorian-style! Oshawa Museum guides will host games and activities on the green, and lead tours of historic Henry House. Bring your own blanket and basket and enjoy your picnic in the Henry House gardens.