When: Saturday, April 21, from noon to 6 p.m.
Where: Diaper Lab, 200 Elm St. North, Cambridge. 617-764-0192.
Help try to put cloth diapers in the Guinness Book of World Records for the most cloth diapers changed simultaneously. Take part in the Great Cloth Diaper Change with your baby. There will be a party after the event with freebies and raffles. Enjoy food, beverages, music, and more.