Needham 4th graders play with and evaluate a toy created by engineering students at Olin College in Needham on Wednesday, Dec. 17, 2014. (Wicked Local Staff Photo / Brett Crawford)

Needham 4th graders play with and evaluate a toy created by engineering students at Olin College in Needham on Wednesday, Dec. 17, 2014. (Wicked Local Staff Photo / Brett Crawford)

Brett Crawford