These colorful and sturdy wheel train shaped whistle will be an instant hit with your party guest. The wheels appear to whirl when you whistle! When you blow through transparent hollow chamber connecting to the whistle spout, round and round the wheels seem to go. There are bright red beads within the chambers that roll around as the train whistle is blown to give the impression that the 'wheels' are spinning. Confirms to toy safety requirements ASTM EN-71. The first plastic whistles were made in the late 1930's. By the early 1950's these Whirling Wheel novelty whistles could be found in dime stores across America. A fun piece of nostalgia for today generations. These is a great collectible item as well.