Add an OR to the end, and I’m like a detective. Add Gadget after that - go, go, get Penny to save the day. Left alone, I look at things to find clues; another word for the work done.

Kids do me on sidewalks, old scratched CDs do me by accident. One makes you smile, the other makes you annoyed.

I rhyme like this, and I'm usually quite keen. I'm structured in order, yet restart in between.

I'm a storage space, it's true, Sounding like an artist, through and through. What am I?

You will never guess me, just cant be done