I've written about the Great Lakes Science Center (www.greatscience.com) before and revealed that it's one of the best museums to belong to because of their ASTC passport program (allows you entrance into 250 museums nationwide).  This saves our family some serious cash when traveling to Chicago as we don't have to pay when visiting the Field Museum or the children's museum.

Besides my children love visiting the science center.  We have a date on our calendar with an enormous star next to it, courtesy of my excited kindergartner, for our next visit.  Every-time we visit we find something new to explore.

Savvy Avenue Cleveland, whose website says "Do more. Do good.  Repeat." is offering a super great opportunity that expires very soon.  It's for 4 Tickets to the Great Lakes Science Center + Free Admission the NASA Glenn Visitor Center for only $20 (retails for $40).  Check it out here. It's too good to pass up.

Disclosure:  I was given tickets to GLSC to help promote the offer.