A few nice Cream images I found:
Hollywood Studios - Ice Cream of Extinction
Image by Jeff Krause Photography
Who can resist a dinosaur selling ice cream?
Ice Cream Man--Summer 1976
Image by Todd Ehlers
"The ice cream man is here!"
Kids scrambled to parents for change. Moms dug in pockets and purses for a few coins, happy to see the kids being occupied for awhile. We stood in line, amazed at the fronds of steamy-cool air that curled from within that magical freezer door behind The Great One's head.
For the groups--
Note my two brothers' socks and tennis shoes, foreground. Both are wearing dark colors. The "brand" of tennis shoe was utterly unimportant back then. A shoe was a shoe.
The shorts were much more form-fitting than today's baggies. No belts nor pockets, either--not visible in the photo, but I attest to their absence. Cut-offs had them, of course, but the shorts on my brothers were the early "store-boughts." I don't remember shorts with pockets till 1983, at least in the Midwest.
That each boy had a printed t-shirt of some sort reminds me that it was in this era, and not much earlier in Dubuque, Iowa, at least, that "message shirts" became common.
I also note the stylelessness of their haircuts.