1. Tear lots of tissue paper squares in 2.5 - 5 cm or 1-2 inch pieces (these do not have to be perfect at all) and wad each piece in little balls.
2. Apply glue to the surface of the egg and just press the paper wads into the wet glue. Try to place the pieces close to each other to prevent that the egg can be seen through. Continue until the egg is finished.
3. To hang the decorated styrofoam egg, open one side of a paper clip and insert this long end into the top of the egg. This should hold without glue, but if not, you can also add a drop of glue to the end before inserting it.