I don’t have many jokes in my repertoire that are clean enough to tell someone’s granparents, but this is the best one that I’ve got– provided said grandparents aren’ t teetotalers…
A grasshopper walks into a bar. The bartender looks at him and says, “Hey! We’ve got a drink named after you!”
The grasshopper says, “You have a drink named STEVE?”
Ba-dum CHING!