Packed with more than 50 exhibits, events and performances, this premiere festival keeps art lovers and adventurers entertained all month long. Throughout April, Philadelphia’s art organizations join forces to bring music, film and dance performances to you throughout the city, as well as special gallery and museum exhibits. And don’t miss the interactive Time Machine in the Plaza beneath the Kimmel Center’s vaulted glass roof, which lets visitors experience time travel by reacting to them as they stroll through. Festivities conclude with a street fair on April 27, featuring a dinosaur petting zoo, giant Ferris wheel and more!

With a goal of making science accessible, interactive and fun, the Cambridge Science Festival brings STEM—science, technology, engineering and math—to life for during this 10-day event, April 12–21. The festival’s range of entertaining and educational activities includes movies, concerts and plays as well as lectures, debates and workshops. And check out fascinating exhibits like “A Walk Through Geologic Time” and stroll through the ages along the Charles on the MIT side of Memorial Drive (where inch an represents 240,000 years).