These are such a super cute little pack of whistles. I got these to use as party favors for my son’s birthday party. They were a big success!!! They all work and make a great train sounds. They were smaller (thinner) than what I pictured them to be but in all actuality work better than a bulkier one when it comes to adding them to favor bags. I did receive these at a discounted rate for my honest review, which did not sway my opinion one way or the other. These whistles are great and you won’t be disappointed.