My daughter received a mini I Spy Bag for her birthday from my friend. An I Spy Bag is a little bag that cannot be opened and is full of tiny little items for your child to find through a window on the front. We are about to go on vacation and I think these will be great for the plane ride. If you are going on a long car ride or on a plane, you should get one for your child! You can find many of them on Etsy, but my favorite I Spy Bags are created by The Crafting Corner. They have a standard size, a mini size, and even a party favor size. Visit their shop to see all of their I Spy Bags.