1 Kodak Instamatic camera (any model will do)
1 old disposable/one time use camera
1 pair of cutters or dikes
1 roll of black electrical tape
1 roll of 135 35mm film 100-200 speed
1 roll of clear tape
The name of the game here is making a camera work with film for which it was not intended. If you take the 135 film and try to install it in the instamatic you can get an idea of what has to happen to make the magic. You'll notice that the window is too big for the film, the camera has no way of winding the film, and there is no way for the camera to mark the individual frames. The second problem is the only one we're concerned with as the other two are going to make your photos interesting. Embrace the flaws.
First, take the disposable camera, assuming that you've used all the film, and break it apart. Don't worry, the roll of film inside is in its cannister so it won't ruin. At the top right will be a large gear. This is the winder. Yank it out of there because this is what you'll need to adapt the 35mm film to the instamatic. Also, while you're at it, take the roller that probably fell out. You can use that in the instamatic to roll the new film.