I will personally be making liquid nitrogen ice cream in the vicinity of Benson Hall (behind Bagley), and can assure you that all the Chemical Engineering exhibits are really cool.
I definitely recommend checking the stuff out. I think the AA dept will have the wind tunnel open.
The list of exhibits for all departments is available here:
Whether or not you're not into seeing what engineers do, be advised that swarms of petulant children will descend upon campus tomorrow and saturday