The boys LOVE washing cars! I think we did this almost daily last summer.
First, we gather our supplies.
soap (we don’t always use soap and they don’t seem to mind)
spray bottles (from the dollar spot at Target)
And line up the cars.
After filling the bucket with soap and water, the boys get to work!
I’ve also seen baby doll washing stations. I think the boys would like that just as much, but we don’t have any washable babies!