Let’s Build is a family volunteering initiative bringing engineering into Needham’s elementary schools by training family and community volunteers to support classroom design challenges.  Its major fundraiser, the Let’s Build Engineering Extravaganza, will be held February 4 (snow date February 11), 10AM-2PM at Hillside Elementary School (28 Glen Gary Road in Needham) for Pre-K, elementary, and middle-school children and their families.  Admission is $5 per family.  Let’s Build is currently seeking volunteers and community presenters, so email info@letsbuildengineering.org if you can help.  Scheduled activities include the Needham HS robotics team, What’s Inside a Flashlight? at the Take-Apart Table, ballerinas teaching the science of pirouettes, build your own bubble wand, and create hoppers with Olin College students.