With seven kids I found everything imaginable over the years.
Coins, pens, crayons, bugs, a small garter snake (it survived the washer!), weed (yes, that weed), report cards, keys, lighters, soggy cigarettes, homework, whistles, small toys of every type.
One day I hear a strange noise coming from the washer, opened it and rescued my very p.o.'d persian cat.
My cats presence in the washer was explained to me by my logical 5 year old "He was dirty and I was saving him time" apparently thinking it was easier to wash the cat than to let the cat take care of the problem himself.