These colorful and sturdy wheel train shaped whistle will be an instant hit with your party guest. The wheels appear to whirl when youo 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 1930s. By the early 1950s these Whirling Wheel novelty whistles could be found in dime stores across America. Three colorful styles are sure to appeal to the kid in all of us! These is a great collectible item as well.