What is in it? Well, among other things there is a big fat toy shit that makes farting noises when you squeeze it.
GilstrapTV, Jack Vale and HumorBagel often do fart pranks in public. I watch mostly GilstrapTV. His comments are making the pranks much more funny. For example "I am Fartacus", "Fartality", "Farty party", "Vingardium Fartiosa", "Turdy tornado", "360 noscope", "This was louder than expected", "I buttered my biscuit", "frozen cupcake coming through", "welcome to the barbecue", etc. His acting is also funny. He often acts as if the "farting" would have been an accident.
I am laughing at the I am Fartacus one, that especially sounds quite funny!