1 Nickel Ride Launch Party: A free, eco-friendly taxi service is coming to St. Petersburg. Friday’s launch party at Ferg’s Sports Bar & Grill will show off the electric cars that will offer rides to five people at a time through most of downtown. It’s funded by partnerships with local businesses through advertising. The eight electric vehicles used in St. Pete will have TV screens inside that display advertisements, and drivers, who work for tips, will pass out business swag and coupons to riders. 6-8 p.m. at Ferg’s, 1320 Central Ave., St. Petersburg. (727) 822-4562. 2 Bromeliad Bash: Tour the bromeliad gardens and get inspiration for your landscape. Colorful bromeliads, from common favorites to extraordinary and unusual types, will be for sale, and experts will provide care advice and ideas for planting location and designs. 9 a.m.-2 p.m. Saturday. USF Botanical Gardens, 12210 USF Pine Drive, Tampa. Free. (813) 974-2329. 3 National Watermelon Day: The East Lake Community Library will celebrate National Watermelon Day with free watermelon, watermelon-themed giveaways and a drawing for a watermelon beach ball. 10 a.m.-3 p.m. Friday. 4125 East Lake Road S, Palm Harbor. Free. (727) 773-2665.4 Tampa Bay Youth Sports Expo: Kids, parents, coaches and sports administrators can sharpen their skills while getting ready for school. Activities include interactive skills zones, live demonstrations, DJ dancing, games, food, vendors and a backpack giveaway. 10 a.m.-3 p.m. Saturday. Skills Center, 300 E Sligh Ave., Tampa. Free. (813) 703-1324.5 Free Tuesday at Glazer Museum: The hands-on museum and the Children’s Board of Hillsborough County join for this event offering free admission from noon to 7 p.m. Tuesday. This month features a character appearance from PBS by Daniel Tiger. 110 W Gasparilla Plaza, Tampa. (813) 443-3861.