A little more digging turned up this article written in 2018 by Elvia Limon with the Dallas Morning News. It states "Penny Whistle Park became a Dallas favorite soon after it opened at 10717 E. Northwest Highway and Plano Road in 1967. The park’s attractions included an aluminum merry-go-round, a ladybug ride, a ball crawl complex and its Ottaway steam train.

According to a 1993 article by The News, the indoor entertainment park was "clean and pleasant, and the carnival rides with lots of flashing lights harken back to a weekend festival at the fairgrounds." The calliope music and first-rate carousel also gave the park an "old-time feel."

The park's main source of income was from parties. In its prime, Penny Whistle hosted 60 to 70 parties a week, former owner, Dwayne Steck told The News in 1995. But by the mid-'90s, the park was hosting fewer than 30 parties a week. Steck also said the park had to compete with other venues that had more modern rides and other park equipment. "In the early days, we were the only people doing this," he told The Newsin 1995. "But now, big corporations have gotten involved and operations like this can't compete."