Whoopee Cushion
It's pure coincidence that Lord Phartwell was Mr Blackwell's nickname at school. Pure coincidence.
This mirth-generating item has garnered ripping reviews all around the world. Give this as a gift and they'll be trumpeting your greatness from dawn 'til dusk; tooting your horn right, left and centre. They just won't be able to hold it in. The joy will linger.
This device is a breeze to operate, but be careful not to force it.