As you all know, everybody loves Katamari Damacy. So, since I broke my Bobomb keychain, I figured a katamari would be the bestest object to attach my only key to.
I used regular modelling clay. Cernit. I guess you could pretty much use which ever colors you like the best to match up your own favorite katamari but I used white, blue, yellow, orange (was going to use red but couldn't find my red lump of clay..) and green. And one of those metal hook thingamajiggies (english is not my mother tongue..).
 So, what I did was I rolled tiny little balls in each color. Each matching color set of balls tinier than the other set. I made sure to wipe my hands off every time I handled a different color, so that I was not going to stain or mix the different colors together..
 I flattened the little balls on top of each other to make one of the katamari's little "knobs". Then I gently tried to push the metal hook thingamajiggy down into the "knob", trying to keep the "knobish" shape. This proved time consuming, but I did OK.
 Then, makeing the rest of the knobs was easy.. Big, smaller, smaller, smallest..
I actually wasn't sure how many or how big "knobs" I wanted on my katamari, but I wanted it to fit in my pocket and figured that 6 little knobs should do it. And so I rolled a much bigger ball to which I would attach the "knobs"..
 And attached the first.
..and the rest. This was the worst part of it all. Trying to keep the main ball's ball shape intact and also keeping the "knobs'" lines straight. In the end I'm pretty happy with the result, as the jiggly lines gives my katamari a nice handmade feeling..
 And then, into the oven. low heat for thirty minutes.