I bought two of these for the kiddos to send signals to one another from treehouse to lookout point across creek. The owl hoot meant ""who goes there"", a response of coyote meant if was one of the pack of four cousins and coast was clear. They had great fun wearing these cross body with a piece of leather looped through handle on various adventures out back. Love hearing and watching the fun! Only downside is I wish they had to blow the horn to make the sound- they still put their mouths on it as if blowing. Would recommend