OK, I looked it up because there are people who want to build rockets here and go fly them nearby.
From the Carrollton Code of Ordinances:
Sec. 133.16. - Certain activities prohibited.
Within the limits of any public parks, it shall be unlawful for any person or persons to do any of the acts hereinafter specified, except as may be otherwise provided:
(C) To carry or discharge any firearm, firecrackers, rockets, torpedoes or any other fireworks, airguns, BB guns, bow and arrows, slingshots; or hit golf balls except in designated areas.
The semicolon following "slingshots" seems to indicated that only hitting golf balls have a designated area.