Framingham State University will host its Science on State Street festival on April 25, 10AM-4PM, on its campus — see map and directions (PDF) — free and open to all ages. Activities include: Build a Battery, Food Waste and You, Solar System Walk, Mapping Climate Change, Cool & Practical Robots (iRobot), NAO Robot Demonstration, Game Through a Network, Engineering Club Demonstrations, and NASA Spacecraft. Pre-register for free, high-definition planetarium shows to celebrate the 25th anniversary of the Hubble Space Telescope by clicking on one of these times: