This was taken in front of the MFA. I was riding on the T when we went by the MFA and I thought it was pretty funny to see a giant baby head. There is one on either side of the museum building's entrance. Apparently, they planted them for spring!
If you look at my Stormy MFA photo from Nov. you'll see that there were no baby heads at that time (this baby head is located in the left corner by the tree).