I made a photobooth for my brother’s wedding this next weekend.
Parts
The user walks up to the Easy button, presses it and the camera takes 4 pictures. Wirelessly, the EyeFi pro card transfers images over to the laptop and there is script running in the background to take the images in that directory and print them out with a wedding photo of Andrew and Jenn.

The whole thing takes about 1 minute and 30 seconds from press of the easy button to print out. The guests get to keep a cool souvenir, then Andrew and Jenn get to have the pictures afterward stored on the computer.
If you want to get more technical, the script running on the computer is a simple python script looking for 4 images. Hopefully, I’ll be able to just walk around the place, take 4 pictures, and have them automatically printed. We will see.

Edit:
This is basically what is inside the box. Just replace the mic with the easy button. There are a couple of transistors and resistors connecting the wires to the 2.5mm Canon Rebel jack.
