Giant Step was a short-lived primetime game show aimed at and featuring children that aired on CBS from 1956-7. Bert Parks, better known as the host of the Miss America Pageant until his passing in 1992, was the host.
To be honest, until seeing this on YouTube some months back, I didn't know the show existed at all. Today, something like this would be plugged into a Saturday daytime block as a teaching tool.
Here's a sample episode. No rating.