The Indian Institutes of Technology Association of Greater New England will host a seminar, Blockchain: Bitcoin and Beyond, on May 19, 1:45-5PM, at the Cambridge Innovation Center (1 Broadway, Cambridge). Tickets are $10 ($5 with student ID).

Boston Tech Mom (“a parent’s guide to raising a future techie”) is a great resource for all things STEM around Boston — including her monthly posts about free or low-cost STEM Events for Kids in Boston. Here’s her May list of STEM events.

MetroHacks, run by high-school students to host high-school hackathons in the Boston area, will host MetroHacks III, a free, 24-hour event for ages 13-18 at the Harvard Student Organization Center, May 19-20. There will be speakers, free food, workshops, games, and prizes. Mentors and workshop leaders can help with projects and with learning Python, iOS app development, HTML/CSS, and more. Beginners as well as experienced coders are invited to register by May 1.

The Boston Red Sox will host two STEM Days:

• May 2: Focus on Science, Weather, and Engineering
• May 30: Focus on NASA and Space

Each will have a STEM fair and a panel of speakers, and participants will have a workbook and a ticket for the 1:05PM game. Teachers should contact Seth at 617-226-6834 or sshuman@redsox.comh to reserve space.

The Cambridge Science Festival is the national leader in its field, with over 200 activities and events spanning 10 days, April 13-22, in Cambridge, greater Boston, and beyond. #CambSciFest is too much to keep in your head. You can filter this year’s online schedule of events by date, age (family/teens/adults), cost, venue, day of the week, time of day, or organizer — and then export your filtered events to your personal calendar.  Browse the lists of Museum of Science activities and exhibits and week-long youth and family workshops. Some events require pre-registration or tickets, and most are free.  Some highlights:

• The opening-night symposium on April 13, 7:30-9:30PM at Harvard’s Science Center ($15):  The Continuing Education of Eugene Mirman, in which this endlessly curious comedian attempts to learn about cognitive neuroscience from MIT professor Rebecca Saxe.
• The Science Carnival and Robot Zoo on Saturday, April 14, 12-4PM at the Cambridge Public Library (free).  Meet robots, explore VR, launch rockets, make slime, and use liquid-nitrogen to make ice cream.
• The Year in Science: Cocktails and Trivia on April 18, 6-8PM ($15) for adults at Mamaleh’s Delicatessen.
• The Science of Local Food on April 21, 10AM-7PM (free drop-in, with fees for some workshops), at Boston Public Market.

If you can’t make it to Boston University to see the LigerBots compete in the New England District Championship at Boston University, April 13-14, you can view the matches online in real time here or here. You can search for LigerBots’ upcoming events in this championship in their schedule. Other videos of the LigerBots’ competitions are archived here.

Edge On Science will host a free event, Solar Science for Families, for ages 7+, on April 15, 2PM-4:30PM, at St. Benedict Elementary School (2 Pleasant Street, South Natick). View the sun safely with a solar telescope and learn about spicules, prominences, filaments, and sun spots.

Framingham State University will show a free film, Symbiotic Earth: How Lynn Margulis Rocked the Boat and Started a Scientfic Revolution: on April 19 at 4:30PM in FSU’s Dwight Hall Auditorium (map).