Children under 13 are free until September 7th at the Adirondack Museum . Adults wishing to get the same experience can go online for a $2.00 off coupon. (On the front page, lower right corner of the website is a blue box titled "Special Offer." Keep in mind that all admissions are valid for a second visit within a one-week period. For those year-round residents of the Adirondack Park the museum is open free of charge during the months of May, June and October. Proof of residency, such as a driver's license, is required.