Unlike the cats, being curious, i think, is the last thing that can kill us, humans.
My li'l cousin became fidgety with the new toy he got, may be just five minutes back. He, not listening to his grandma's advice of not breaking that, my cousin continued doing his job and finally tried splitting his new toy into as many pieces as possible (of course he din't break anything). My brother and I kept watching the fun, apart from hearing to the grandma complain to us, not to buy him new toys. My brother remarked, this is the way one can redesign things and develop the interest for engineering new things. Eventually, this little boy tried fixing this toy back to its form. Indeed he did it. This amazed all of us, and so did my brother's remark.