At one time, Giant Tiger was a pretty popular department store in Northern Ohio. According to this article, it was eventually sold to Gaylords, another chain.
This ad is interesting not only because of the toys (Three Stooges colorforms, Tinker Toys, toy pianos, etc.) but because of Giant Tiger's advertising mascot. What the heck is Tony the Tiger doing in a Giant Tiger ad?? Someone call Kellogg's!