Preparation:
Using a pair of scissors, carefully cut a hole in the bottom right corner of the card box. Kids, get a grown-up to help you with this. You can use the picture above as a guide. To get the right size, cut the hole and slip the cards inside the box to ensure that you can see the index. If you can't, take the cards out and make adjustments.
After cutting the hole, you're ready to perform the trick.
