My Mom use to make her own laundry soap. She'd grate it up into a bucket and then use a scoop to add to the washer.
One day she had a small bucket of soap shavings sitting on the chair in the kitchen, and one of her SIL's walk in and said "wow - look at all those slivered almonds!" yup - he took a hand full and popped them in his mouth. Good thing he was right next to the sink.