1Green Thumb Festival: The surest sign of spring is this annual festival, 9 a.m.-4 p.m. Saturday-Sunday, where you can get your tools sharpened and your soil tested, browse a wide variety of plants, pick up free mulch and buy trees for $5. Don't miss the flower show and children's plant fair set up in the adjacent recreation center at Walter Fuller Park, 7891 26th Ave. N, St. Petersburg. Free.
2Downtown Tampa's Fourth Friday: Tampa's Riverwalk just launched this monthly party, with museums and performing arts venues offering extended hours 4-10 p.m. with free, special or added value admission deals. You can even get a free Pirate Water Taxi ride to make your way down the Riverwalk. Maps and free wristbands can be obtained at venues including the Florida Aquarium, Glazer Children's Museum and the Tampa Museum of Art.
3Earth Day: Both St. Pete Earth Day in Williams Park and EcoFest in Tampa's Lowry Park bring free interactive exhibits and educational activities for families. In downtown St. Petersburg, there will be live entertainment, shopping from green businesses, an "urban bird experience," Mother Earth's Book Nook and a food court 10 a.m.-5 p.m. Saturday. EcoFest features demonstrations and booths from local artists, green businesses, environmental organizations and organic farms 10 a.m.-3 p.m. Saturday.
4Touch-A-Truck: Dunedin's Highlander Park will be loaded with trucks, cars, motorcycles, fire engines, police cars, bulldozers and tractors, and kids will be welcome to climb all over them. It's free from 10 a.m.-2 p.m. Saturday in Highlander Park, 1920 Pinehurst Road.
5VooDood Challenge Wrap Party: Artist Theresa Crout has crafted dozens of what she calls voodoo animals crafted in the brightly colored Mexican folk art style called alebrije. She turned her art into a social media contest, with her followers submitting names as each of her 44 pieces were posted. The winning name received an entry in a drawing to win a custom piece of his or her own. This party at 8 p.m. Friday at the Bricks, 1327 E Seventh Ave. in Ybor, celebrates the 55-day challenge with prizes and a "VooDood factory" where guests can paint an unfinished doll of their own. Free admission.