I use to run over cans of put a card on my bike to get this noise. Now my son can make a little motorcycle sound easy, it’s great!They hate it. That's why I love having it. Nice and loud just like my turbospoke classic cards in the backMakes a good noise, but might not fit on all bikes.Kids loved itGot this for one of my kids and he was iffy about it at first, like he is with everything lol, but as soon as he started riding, he yelled "I love it!" So definitely worth the few bucks for sure. I'm going to get some more since all this kid does is ride his bike now, so need backups in case he wears one out. Thank you Spokester!My son loves this. He got a new bike for Christmas and also got this. He won’t ride the bike without it ? works as it should! There’s a crack in the very end but it hasn’t spread and probably makes it better than worse. It only cracked on the very end where it hits the spokes, so if they made it any thicker it wouldn’t work right so I’m not bothered by the crack. Overall a great product and a tenuous idea. WAY better than a card and a clothespin!This is a birthday gift for my grandson