I know these are cheap, I wasn't expecting a high quality product, but these were so bad I didn't bother putting them in my son's party bags. For one thing they were all dirty. They must have been stockpiled unwrapped in some dirty warehouse and this is particularly bad for a product you're supposed to put in your mouth. To use them you put them in your mouth and blow, but if you blow hard as kids will, all the little inner parts come flying out. I thought they'd be dangerous for children with siblings under 3 as parents wouldn't be on the lookout for small parts. And they only make a whirring noise not a whistle.