To make this game more realistic for a party or for just for FUN you could paint or wrap the boxes in bright colors to cover the writing and pictures on the boxes. You could paint empty milk jugs with the faces of the green pigs to set here and there among the towers. You could buy the round and sturdy licensed Angry Bird plush/stuffed animals to throw at the towers and pigs! It would be endless FUN!
Kids are creative and imaginative. Give them a box and they can have endless fun. Yesterday at the school where I work we had “Young Inventors Day” where we set out large recyclables and let the kids do what they would with the supplies. We extended the time for this activity because the children were having so much fun with the boxes! Here is another great article to read called Fun In A Box with some more great ideas for your children and simple boxes.
Need some boxes? I know that Target stores will give you some boxes if you call first thing in the morning before they are flattened for recycling. You could try other stores near you too!