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In the remake starring Brendan Fraser, it's a pocket calculator.He's led around a convent repeatedly making rude noises and trying to look innocent. Since the Devil throws a nasty twist into each wish, Stanley goes "Phbtbtbtbt!" quite a lot, until, with a wish turning him into a nun ( not what he wanted) it inexplicably doesn't work. In Bedazzled (1967), the Devil gives Stanley seven wishes, giving him the ability to terminate a wish and return to wherever he himself was at the time by blowing a raspberry.After he dies he brings him back from the dead to be with his son.
In Jack Frost the son is given a harmonica the dad claims is magical and will always get him to his son. Benny the Cab tells Eddie that "if you should ever need a ride, just stick out your thumb." Later, just when the weasels are closing in on him and Jessica, Eddie sticks out his thumb off-handedly (to point which direction to run off to) and Benny instantly drives up to pick them up.
A non-verbal variant appears in Who Framed Roger Rabbit. He later does so when Rookery shuts him in a coffin, and Anna, as promised, shows up to let him out. In " The Little Vampire" Anna gives Tony a good luck charm (dead mouse), and tells him to whistle if he ever needs her help. The only effect is that his wife thinks he's insane (well, insane-er), and when his daughter appropriates the bell for her actual bike (which is implied to be the actual reason the angel gave it to him, since he was also planning to rearrange the universe such that Jack would have a daughter who'd be receiving a bike on Christmas morning) Jack gets hilariously upset. The Family Man has its Magical Negro angel/genie/whatever (played by Don Cheadle) give Jack a bike bell with no explanation when they first meet later, when it becomes clear that the guy was some kind of supernatural being who has enacted an It's A Wonderful Life-style universe-rearrangement, Jack is seen walking around ringing the bell like a lunatic, assuming it was one of these. In The Santa Clause, an elf gives Santa Claus' son a magical snow globe early in the film at the end, he tells the kid that if he ever wants to see his father, he just has to shake the snow globe and it will summon his father. and it turns into a rocket powered glider. When she finds herself cornered, she blows it. Finding Kasuga determined to go on a one woman Roaring Rampage of Revenge against Oda Nobunaga, Sasuke gives her a whistle and tells her to blow it when she's in trouble. Later, when being attacked by one of the Priests, Chopper does just that. When the Straw Hats arrive in the Sky, Gan Fall saves them from Wiper, and gives them a whistle, telling them to blow it if they need him. He's a few times given them to allies just in case they're ever in sufficient danger to need it. He can teleport to the location of any of the kunai, and he's more or less the most badass ninja ever to exist (discounting legends), so his allies can use them as basically infallible one-hit-kill weapons.
This seems to be how Minato's Hiraishin kunai work in Naruto.Note this example of defiance made Rubber Shooter Hidenori's role model. While Rubber (band) Shooter did give a bullied, younger Hidenori a whistle and told Hidenori to call him with the whistle when Hidenori needs help, when Hidenori actually got bullied and attempted to use the whistle, he appeared and asked Hidenori not to rely on the strong to always help him. Defied in Daily Lives of High School Boys.