From the website: Take a peek behind the scenes! On select dates we open the doors of the Science Museum's labs or Collections Vault, giving you a rare opportunity to see some of the hidden items in our incredible collection and get a glimpse at what it takes to care for them. You'll also meet our researchers and volunteers and learn about the exciting work that's underway in their labs.
Behind the Scenes tour is included with general admission. Tickets are available in person at the Box Office or by phone at (651) 221-9444.