I went to the MIT museum on one of Bank of America...

I went to the MIT museum on one of Bank of America's free museum weekends. You bring your BofA card and ID and you get in for free on specific days.

I thought it was great how many people they had out doing demos and interacting with the material. I especially liked that you could make little aluminum boats and see how many pennies they hold.

There was an exhibit associated with Polaroid when I was there as well as some cool metal sculptures that moved with the use of gears.

It took maybe an hour to go through everything. I'm not sure it would have been worth it to pay full price unless you have kids. Part of the museum was also in transition and was closed off when I was there (early November).