Community-service organization Public Allies Miami hosts its annual "Leaders in Bloom" annual fundraiser. 6 p.m. Fairchild Botanic Tropical Garden, 10901 Old Cutler Road, Coral Gables. $25. Details: www.publicallies.org/miami.
Baptist Children's Hospital psychologist Dr. Kaia Calbeck give tips on how to prepare your child for next school year in community parenting program "Ages and Stages: Planning for Changes." Not intended for children. 7-9 p.m. Baptist Children's Hospital, 8900 N Kendall Drive, Kendall. $5. Details: (786) 596-3812.
The Miami Science Museum hosts the first annual Miami Underwater Festival. Includes screenings of award-winning films related to the underwater realm and the museum's newest, hands-on "Stingray Sea Lab" exhibit. Learn about the creatures that call area sea grass beds home and touch live stingrays in a 3,000-gallon tank. Presentation times vary. Ends May 28. Miami Science Museum, 3280 S Miami Ave., Coconut Grove. Price included with admission. Festival only is free for children under three, $5 older children and $8 others. Details: (305) 646-4200 or www.miamisci.org.
The monthly Viernes Culturales/Cultural Fridays arts and culture street festival and gallery stroll in Little Havana's cultural district features a free walking tour of Little Havana with historian Dr. Paul George, live entertainment and an artist fair along Calle Ocho. Special this month, the Viernes Culturales Gallery (724 SW 16th Ave.) celebrates World Refugee Month with exhibition "The Refugee Artists." 6 - 11 pm. SW Eighth Street between 17th and 14th avenues. Free. Details: (305) 643-5500 or www.viernesculturales.org.
Sample varieties of vodka and vote for your favorites in the categories of imported, domestic and flavored during Vintage Liquor and Wine Bar II's first vodka tasting competition. Featured bands include Ciroc, Dekuyper, Smirnoff and Ketel One. 2-6 p.m. Vintage Liquor and Wine Bar II in Midtown 4, 3301 NE First Ave., suite 105, Miami. $5. Details: www.vintageliquor.com.
RA FOR A CAUSE
Savor sushi for a cause during the seventh annual Nicky's Week, a fundraiser for St. Jude Children's Research Hospital. In honor of former St. Jude patient Nicholas "Nicky" Maillard, who lost his battle with brain cancer at 13, the restaurant will donate 100% of proceeds from special Nicky's week menu offerings to St. Jude's children's cancer research center. Ends June 4. RA Sushi, 5829 SW 73rd St., South Miami. Details: (305) 341-0092 or www.rasushi.com.