Luke loves to "help" fix all kinds of things around the house with his tools. He hasn't quite figured out 100% the accurate uses for each tool, but he has a great time trying. For instance, when he uses his screwdriver, he turns it like he's supposed to, but he'll do that on an area with no screw in sight.
I've even found Luke sitting on a couch, hugging his tools. Not doing anything else with them, just hugging them. He is just too cute.