Last year we got a clear plastic umbrella
and covered it with bubble wrap. Then we attached long, thin strips of
bubble wrap (small bubble variety works best) and shimmery fabric to the rim
of the umbrella with a stapler. Hold the umbrella over head and let
the long strips fall around you. My daughter was the most wonderful Jellyfish.
When she opened and closed the umbrella slightly her "tentacles" undulated as
if she were floating in the water.
Thanks to Mary for this wonderful idea!!