This product, available as two separate maps, one for the Denver Mint and the other for the Philadelphia Mint, is an excellent and educational way to display the series of state quarters. Coins are easy to insert and observe once inserted. The maps are enriched by historical information about the 50 states and fit nicely in a folder sleeve for storage. Most important, the US Mint no longer sells this product, so finding it available from Coin Supply Express was a treat, and excellent customer service was provided. I purchased one set of two maps for each of my four grandchildren, all of whom are now on the lookout for state quarters for their maps.