Need something to smile about? Summer's around the corner, and the National Museum of Dentistry is welcoming the season's arrival with a circus-themed family celebration Saturday. Now let's see that smile. That's it.

"Under the Big Tooth Top" will feature dental treasure hunts, toothbrush games, Horn's Punch and Judy Show, face-painting by Bambini, clown-art activities and more. Visitors can explore the interactive exhibition Terrific Tooth Tales, tour Branches, Bristles and Batteries: Toothbrushes Through Time, and see toothy displays at 32 Terrific Teeth.

The museum's back yard will become a summer barbecue area with grilled foods and snacks. Visitors will receive free smile kits and other dental giveaways. And a dental hygienist will be on hand to offer free oral-health-care information.

"Under the Big Tooth Top" runs 11 a.m.-3 p.m. Saturday at the National Museum of Dentistry, 31 S. Greene St. $3; free for ages 6 and under. Call 410-706-0600 or 410-706-0810.