Anyone who has kids, especially little ones, know the value of a great museum. Your kids discover, learn and basically get entertained for hours. I was just remembering that when my kids were small we purchased a museum pass called Passport Program. You basically purchase it instead of buying museum tickets. A few years back it was the same price for a passport as compared to a family museum pass. Here is the website :

The website is the ASTC - Association of Science and Technology Centres

Good Luck!