So true. My (then) 13 year old made about $800 last year selling scarves he made. That was just in one crafts show and one half day in front of our house with a table set up.
He could make more if he worked on them year round, lol. Or branched out into hats/slippers/other loom knitted goods.
(also, in the land of people will buy anything, the scarves that sold out first were the "mini" scarves that he made using yarn that didn't have enough left for a full scarf. We labeled them as "mini/pet/baby" scarves and more than one person bought some for their dogs. We did not expect the mini scarves to sell out so quickly!)