The advantages of a shield and how a shield works is kinda obvious, So I will just say how to make one.
Needed Items
19.5 in. by 17 in. piece of cardboard
Three 8 in. by 1.5 in. pieces of cardboard
Trash Bag
Packaging Tape
Scissors to cut Packaging Tape
Instructions
Tape the smaller cardboard pieces on the big one so that they curve and so that they are paralell to each other going down the middle.
Lay the trash bag over the side of the big cardboard piece that the little pieces aren't on so that the edges of the trash bag go over the edges of the larger piece of cardboard.
Fold the edges of the trash bag over so that they cover the edges of the large piece of cardboard and tape them in this postion.
