I just picked out up for sunny today for the airplane ride tomorrow and he has been playing with it all night its so cool lol its just like a normal squeaky toy to him but i cant hear it at all its very cool it like squeaks on those sound waves dogs and hear but people cant, the toys themselves are really sute its like a little family a toys a mom and a dad and a brother and a sister and 2 pets were the parent toys are for bigger dogs and so on i got sunny the medium one but the small size proubly would have been better anyways i just wanted to say that this toy is awsome and i think it will be great for the plane and staying at familys house because he loves his squeakys but they are so dang annoying to everyone else