Self Inflating Whoopee Cushion Enjoy endless fun with this self-inflating whoopee cushion. It is always ready to make its classic trumpeting noise. Easy to use, the struggle of blowing your whoopee cushion in time for the next prank is over. This is an hilarious joke that never gets old! Simply place it on a chair hidden from your unsuspecting victim and watch as they sit down and release a large inappropriate noise! A brilliant gift for any practical joker out there. This makes an ideal birthday gift or stocking filler. Warning: Choking Hazard. Small Parts. Not suitable for young children.