For small animals only, put toy in one of those net laundry bags, bag
should fit, not overlarge.
Pop in machine and wash as usual, gentle/delicate cycle. I generally
do one at a time.
Been doing this umpteen years.
However, if your machine has a large agitator, beware, it may damage
Mine has no agitator at all and "fuzzy logic", which chooses its own
Front loading will work, but put in some small, light articlea or towels
to buffer the tumble, set gentle/delicate.
: I don't use North American agitator-type machine.