Midtown Greenway Community Bike Festival

Live swing, jazz and blues provided by Grand Marquis. One-hour and 30-minute guided bike tours. Free bike tuneups, decorations and other giveaways. A children's bike rodeo and free snacks, more. (Noon-5 p.m. Sat. Free. Midtown Greenway, between E. 27th and 28th Streets, Mpls. www. midtowngreenway.org.)

YOUTH SCIENCE DAY

This new event provides an afternoon of fun that celebrates children's interest and participation in STEM (science, technology, engineering and mathematics). Young people will exhibit what they've accomplished. Visitors will see what local teens are doing to help them get involved in STEM educational and career opportunities. (1-4 p.m. Thu. $10-$13. Science Museum of Minnesota, 120 W. Kellogg Blvd., St. Paul. www.smm.org.)