Jonas is obsessed with guitars. Anytime he draws something, such as with chalk on the sidewalk or with markers on a library craft project, he declares that it's a "guitar" (though of course it's just a bunch of scribbles!). When music comes on somewhere, he sometimes yells "guitar," and he's usually correct!
There were some games by the pool at our hotel, including this giant Connect 4 set. Jonas took out the bottom bar and turned it into, what else, a guitar!