I saw these I Spy bags on Sew, Mama, Sew's Scrapbuster month and had to try them for myself. I went back to see how it was done, but the tutorial was taken off for some reason. I just tried to make it from what I saw the first time and turns out they are pretty easy and quick to make.
I wanted to make my niece and nephew animal bags, so I drew them right on the fabric and cut two layers of each out. Then I cut a window out of one layer of each and fit a piece of thick, clear plastic in and stitched it on. I added eyes, nose, etc to the front layer then I stitched the two layers together leaving a 2 inch opening in the bottom to add the filler. I added tiny star pasta, buttons, numbers, and different little charms that were half off at Hobby Lobby. Sorry these pictures are so bad. I promise they look better in person.