There are plenty of diy instructions to be found on internet. These party favors are fast, easy, reusable and adaptable for other fests. I made confetti with a hole punch, used scrap paper for confetti and to cover toilet tubes, cardboard (back of notebook type is hard but pliable), 12” balloons and glue.
Alterations I made from original linked tutorial were: an extra strip of cardboard inside and at the end of the toilet roll to make it sturdy enough for the balloon to wrap around. I also found cutting balloons in three fourths rather than in half a firmer fit for the tube.