There is something about the dirt. The smell of it, the curiosities of random organisms crawling through it. Young and old alike revel in different ways with it, but enjoy it all the same. I was digging in a side patch of garden, and saw something gray scurry by. It wasn't a mouse, probably a vole, but it instantly sent me in a scream of, "ahhhh!!!! get it! get it!" which instantly made everyone run close, but alas within those .025 seconds, it had run off to locations unknown. Honestly, it was hilarious, exciting and a bit unnerving wondering where it went and how it might affect the future of the garden. However, now the kids are armed with a story of "something gray and furry lurks in this corner" in addition to the stories they make up about the "bunny rabbit that lives under the deck".
I guess even at this age, finding big worms is exciting. The only difference is I just smile and keep it to myself... that is unless I find a ginormous one. Then it calls for "AAAAAAA!! Kids!!! GIANT WORMIE!" and the fountain of youth goes on.