Even more fun if you set your eggs under a broody mom is to watch her dust bathe with the chicks. Dirt flies everywhere, over her, over the chicks, and they just love it and crowd around and imitate!
I wish we didn't have the word dirty or soiled in our vocabulary as something bad. Dirt is good, soil is good. "There are more microbes in a teaspoon of soil than there are people on the earth."
https://ohioline.osu.edu/factsheet/SAG-16 And by and large they are beneficial. Raising chicks in a dirt floor pen pretty much means you don't have to do any cleaning. It just all gets mixed in and richer every year.
Wait until your chicks find bugs. I find that some love worms and some don't but all of them love the Japanese Beetle grubs. I tear them in half for younger chicks, but a bit older and oh what fun. Throw some grubs in and watch the chicks run....since they can't get them down in one gulp they have to put them down to work the grubs over. But that means another chick can grab it away. Its like watching bumper cars at the fair. Much better food for them than anything we offer.