Science on Saturday
60-minute presentations where children can volunteer
Open to elementary, middle, and high school students
Free (first come, first seated)
https://mitmuseum.mit.edu/program/science-saturday

Science Club for Girls
2017-18 slots are still available for teen girls
http://www.scienceclubforgirls.org/teen-programs-overview

Girls Who Code
Cambridge Public Library hosts weekly clubs for girls 13-18
See the flyer here: GirlsWhoCode
https://girlswhocode.com/clubs