The fun is just in making them. But old people do not like mud. We think it is a nuisance. It ruins our shoes. We see no fun in a mud puddle at all, but a little kid does.
Kids collect butterflies and sea shells and strange colored pebbles and baseball cards.
Grown-ups collect stocks and bonds and interest on their savings and receipts to back up our income tax deductions. Kids clip pretty pictures out of magazines and paste them in scrap books. Grown-ups clip coupons in an office at the bank. Lots of old folks have no other sport than that. Such a pity.