Cut the paper into strips of roughly 40cm x 10cm.
Take one of the strips and tape it together so it forms a loop.
Thread the next strip through the first one tape together and continue.
You will see it begin to look like a chain.
Continue this until it is long enough to stretch from corner to corner across the ceiling.
Make another one for opposite corners.
Tape a piece of string in a loop to each end of the chains.
Now get an adult to hang it from the ceiling.