tortoise
Wild Hare
He is 12. I pulls the little ones out with a dandelion weeding tool. He goes for the smallest ones. LOL. spring through fall, when he mouths off to me I tell him to dig thistles, usually 200. Which takes him about an hour. Part of the pasture is 75% thistles. Mostly little ones. DH brushhogs the pasture before the can set seed, but we're not winning. It's worse every year.That certainly supports my pulling tactic.
How old is your son? Some of those thistle are hard to pull for an adult