This is one of my favorite El Duco effects. manufactured in his Anglo Cards (bigger than regular cards but not quite Jumbo Cards)
Hole In One is every magical golfers dream. Even if you don’t play golf, this will be the closest you ever come in hole with one, because the routine is all about a hole and a golf ball! This is great entertainment for any audience.
Display four jumbo cards. Three cards have red backs and one has a blue back. Draw a circle with your finger on the pack. When you separate the cards, the blue card has a big hole in it! The audience thinks you have an extra blue card. So you show every card one by one and place them on the table. There are only four cards. Three red cards, and one blue card with the hole in it. Pick up the cards and spread them towards the audience. Now the blue card with the hole has changed to green! Toss the red cards on the table. A green surface with the hole. It looks like a golf course, you explain. So here we have hole in one, you continue with a smile as you point to the hole in the card. Imagine the reaction when your empty hand suddenly reaches into the hole and you produce a real golf ball!