Mainsail Art Festival: In addition to 250 professional artists, Mainsail presents the Young at Art student show, Kids Create activity tent, live music and a variety of culinary art food vendors. 9 a.m., Vinoy Park, 501 Fifth Ave. NE, St. Petersburg. Free. (727) 893-7039.
Surfrider Earth Day Clean Up Party: Anyone interested in paddle boarding is invited to a land and water based clean up followed by an introduction to paddle boarding class, Kai water fitness and a "Yoga on the Water" session. Complimentary lunch provided for everyone participating in clean up portion of the event. 8:30 a.m., Urban Kai, 700 S Florida Ave., Tampa. $10. (813) 598-1634.
Downtown Saturday Morning Market: More than 170 local vendors including farmers, growers with fresh produce and gourmet and specialty foods, fresh-baked breads and treats. Also, hand-crafted items, live entertainment, flowers and plants. 9 a.m., Al Lang Stadium, 230 First St. SE, St. Petersburg. (727) 455-4921.
Green Thumb Festival: Loads of flowering plants, fruit trees, unusual and unique plants, herbs, garden art and accessories, fresh produce for sale, at the popular annual garden and greenery fest. 9 a.m., Walter Fuller Park & Center, 7891 26th Ave. N, St. Petersburg. Free admission. (727) 893-7441.
Record Store Day at Microgroove: It's time to celebrate the independent music retailer which also means special releases, live music, beer/coffee/pizza and just a good ol' fashioned party in general. 9 a.m., Microgroove Records, 4906 N Florida Ave., Tampa. Free. (813) 667-7089.
EcoFest: A celebration of the local businesses, organizations and individuals dedicated to sustainability. Also, a parkour agility course, kid friendly yoga, crafts and games. 10 a.m., Lowry Park Bandshell, 7525 North Blvd., Tampa. Free. (813) 948-4190.
March for Science: Held in conjunction with the Earth Day celebration, this march demonstrates our area's passion for science and puts out a call for support of the scientific community. 10 a.m., Poynter Park, 1000 Third St. S, St. Petersburg. Free. (401) 207-6593.
St. Pete Earth Day: Learn to respect and protect our planet at this festival with interactive exhibits, Earth-friendly shopping, Mother Nature's Book Nook, Electric Avenue, a food court and music on the bandshell stage. Music runs until 10 p.m. 10 a.m., Williams Park, Fourth Street and First Avenue N, St. Petersburg. Free. (813) 308-9333.
Florida Blueberry Festival: Music and street entertainment, wine bar, food concessions and a market featuring Florida-grown blueberries and other produce, blueberry kids zone, retail exhibitors, artisans, beer garden and the Urban Slide. Tickets to the Urban Slide, a 1,000-foot long slip and slide, are extra, and sold separately. 10 a.m., Downtown Brooksville, Main Street, Brooksville. Admission $10, $5 ages 13-17; free for ages 12 and younger. (352) 754-4173.
Truck and Tractor Pull: The competitive motor sport features modified farm tractors, modified tractors or trucks dragging a metal sled along a prescribed course. 5 p.m., Hernando County Fairgrounds, 6436 Broad St., Brooksville. $15, $10 ages 4-12. (352) 796-4552.
Gatsby Gala: Fedoras for guys and fringe dresses for "dolls" at this roaring '20s party in an outdoor speakeasy. Includes music by DJ Kevin Daw and Bobby Tess and the Dixie Land Band, a "Prohibition" Ring Toss, "Scar" bar cocktails, craft beers, food from area restaurants, auctions and a photo booth. Bring a new unwrapped toy for $5 off admission. Benefits Santa's Angels. 6 p.m., Friendship Park, 164th Avenue and Second Street, Redington Beach. $30. (727) 362-3397.
American Stage in the Park: Hairspray: Catch the Tony Award-winning musical based on the John Waters film for American Stage's annual play in the park. Through May 14. 8 p.m., Demens Landing, 100 First Ave. SE, St. Petersburg. $18-$20 lawn, $32-35 premium blanket, $38-$40 reserved. (727) 823-7529.
Rocktopia Live: A performance celebrating the fusion of classical music with classic rock featuring five world-class vocalists, five rock musicians, an orchestra and choir. 8 p.m., Carol Morsani Hall at the Straz Center for the Performing Arts, 1010 N MacInnes Place, Tampa. $36-$76.50. (813) 229-7827.
Lil Eazy-E and Layzie Bone: The son of the late N.W.A. rapper and the Bone Thugs-n-Harmony member team up for the, For The Love of Eazy-E tour, where fans can expect tributes to the gangsta rap pioneer. 8 p.m., The Local 662, 662 Central Ave., St. Petersburg. $23.75. (727) 258-4829; daddykool.com.
KIDS AND FAMILY
Live Action Battleship: Youth in the fourth through seventh grades are invited to play in this outdoor "live" game of Battleship. Players must protect their own fleet while attempting to annihilate the opponent's. Those playing must wear clothing and shoes they don't mind getting wet. A waiver must be filled out. 2 p.m., South Holiday Library, 4649 Mile Stretch Road, Holiday. Free. (727) 834-3331.
MORE TO EXPLORE
Find Earth Day events at tampabay.com/things-to-do.