More than 60 exhibits will offer hands-on experiments and lessons about the environment, alternative energy, space exploration and biotechnology.
The fair will be held from noon to 5 p.m. Parking and admission are free.
Rockville Science Day is sponsored by the City of Rockville, the Rockville Consortium for Science, the Rockville Science Center and Montgomery College.
The Rockville City Council on April 2 issued a proclamation declaring Sunday as Science Day in Rockville.
Click here to read about and see photos from last year’s Science Day. Or view the video above to see a preview of this year's festival from Rockville 11.