Families looking to celebrate science, engineering, and math should check out Cambridge’s Science Festival. There is a science carnival and robot zoo (!) this Saturday at the main branch of the public library and the War Memorial gym, but there are all sorts of other events happening from the 17th to the 26th, including: multimedia arts programs, lectures, special exhibits and/or free admission at local museums, opportunities to learn new skills, a tour of MIT’s research reactor, and more!