Play in the mud to celebrate International Mud Day from 1 to 3 p.m. Sunday at Sweetbriar Nature Center, 62 Eckernkamp Dr., Smithtown.

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Make mud pies, create princess mud (mud with glitter and rhinestones in it) and more. “It’s rain or shine, because if it rains, that just means more mud,” says Isabel Fernandes, wildlife care coordinator for Sweetbriar.

Cost is $5 per child; adults are free. For more information, call 631-979-6344 or visit sweetbriarnc.org