Pranks with hairballs.

Not really pranks but possible uses???
Roll it in beaten egg and cover it with breadcrumbs. Deep fry it and serve it as a 'Scotch egg' - or cover it with gravy and serve as a meatball.
Roll it in PVA glue and then glitter to make an attractive Christmas tree decoration
Get a pet mouse of hamster and let him live in it (how big is this bouncy ball???- dont they come in assorted sizes?)
Put it in a glass display case complete with engraved plaque and tell people its the hair or some other 'mummified' part of some historical figure - great talking point at dinner parties.
Leave it outside for the birds to line their nest
You could do magic tricks with it because it would squash in your hand to be easily concealed as tho' it had disappeared.....
OK I give in... what ARE you going to do with it??