Join archaeologists to get hands dirty while cleaning and identifying real artifacts found on sites across Prince George’s County. Each event also features a game or activity, like atlatl spear throwing, 3D pottery mending, and tours of the scenic property (ages 8+). 1-3pm, Mount Calvert Historical and Archaeological Park, Upper Marlboro, $7 w/discounts, RSVP: https://tinyurl.com/2p88bv3c.