I remember in ancient history (late fifties) that Wonder Bread would hire a blimp which flew over various OKC neighborhoods and would drop balloons which contained coupons for prizes and free passes to Spring Lake Amusement Park.

I seem to recall they ended the promotion when a young child ran into North Pennsylvania Avenue near Northwest 36th Street and was struck by a vehicle as he/she tried to catch a balloon and another fell from a roof top where one landed.

The more I think about it, it may have been Colonial Bread, which later became Rainbow Bread.