Pipe Cleaner... I certainly don't know much about fungi... but I'm still here!
The trick is to be absolutely certain that you can identify those mushrooms that are first and foremost edible, and second, can't be mixed up with any other species. There are plenty fitting the bill... including parasols, penny buns, puffballs, ink caps, etc.
A note about ink caps... they come in 'shaggy' and 'smooth' varieties. Both are edible, but if you like an alcoholic drink with your meal... DON'T eat the 'smooth' ones, or you'll puke!