Your sonic screwdriver might not work quite the same as the Doctor's, but it's still got power. A simple plastic toy, with a noise chip, and bright shiny colors. It makes really odd sounds. I'm not sure what sort of noise I would expect a screwdriver to make, since normally they are a quiet tool, but this one makes cartoon sounds for lack of a better description. Like when someone gets hit or falls in a Warner Bros cartoon, there's boings and honks that kind of thing. It's real power though is to make you laugh.
Ever since you first heard the silly sounds and saw the blinking lights it tickled your fancy. You couldn't even sit up, and you would get angry for reasons that we just couldn't fathom, sometimes all that could fix you was that screw driver. Amazingly even now, it still works. You're bigger now, and completely mobile, but the screwdriver cracks you up. The difference now is that you can pick it up and run around the house with it, pushing the little red button and making yourself laugh. Still, if all else fails it's what we will turn to. We screw in all your loose screws and more times than not you're giggling before we're done.
I haven't managed to grab a picture of you with the screwdriver, because you're so funny that I don't want to go downstairs to get the camera and miss all the good times. So I'll just attach a random picture of you grinning at me while you "help" with the dishes.