Albert Einstein was born 146 years ago on Pi Day, 3.14 (March 14), and celebrating the number and the man helps get kids excited about STEM topics.

The nascent Princeton Einstein Museum of Science will offer a variety of free hands-on activities related to Einstein’s scientific legacy on March 15 at the Princeton Public Library from 2-4 pm. They are suitable for ages 5-10.

Children can talk to Silvia Trinczek, a scientist from Princeton Plasma Physics Lab, to receive a free compass or space tattoo, while supplies last. Ask her your most probing physics question, or if you are not sure what to ask, choose one from the museum’s suggestions including “Why is the sky blue?” and “What’s inside a black hole?”

Then try a prototype “thought experiment,” which will be featured in the museum’s 2025 exhibit, “Einstein’s Brain: Mind of a Genius.” Children can also play with magnetism activities and take home worksheets on the speed of light and do-at-home magnetism experiments.

For more information about the future museum, visit PrincetonEinsteinMuseum.org.