Tutorial for an easy-to-make a real life Angry Birds game.
Step 1: Cutting Slingshot Shape
Making the slingshot is probably the hardest part. In order to make this slingshot, cut out a similar slingshot shape into a cardboard sheet (search slingshot in an image search for reference). Then, using a cutting tool, cut out the traced shape.
Step 2: Layering
Next, you should layer at least 3 cardboard pieces for durability. The more layers, the better - to a point.
Step 3: Stabilizing the Slingshot
To make sure the slingshot doesn't bend unnecessarily, tape the upper half of the slingshot as you feel fit.
Step 4: Finalizing the Slingshot
To finish off the slingshot, adhere the rubber band to the slingshot by using tape and wrapping it around the slingshot. Wrap it tightly for a few minutes or until you can pull the sling without a chance of the band coming off.
Step 5: Creating Angry Birds Ready for Use
This step is the easiest because all you need to do is cut out cardboard squares and glue on or tape the birds onto the squares. Use boxes for the pigs and do the same.
Use the following link for some templates of the birds and pigs.
Once made, create little slits in the cardboard (similar to the opposite end of the point of an arrow) for increased accuracy when sling-shooting the birds.
Step 6: Angry Bird Tower
You can use small boxes (less than a cubic foot) or create small boxes out of cardboard pieces. Stack them in any fashion you like, with the pigs spread throughout the tower and have fun!