The phone has to be a reasonable price.
The phone doesn't have sharp edges.
The phone has a speaker.
The phone isn't made of Big Daddy's Pizza.
The phone calls people.
IPod is relatively cheap to purchase. (Not $10,000)
The iPod plays music.
The iPod needs to have X6Cr17 stainless steel plate to prevent shattering when dropped.
The iPod fits in your pocket.
The iPod looks nice.
Making items in the opposite direction than normal.
Using preexisting designs to come up with ideas.
Taking items apart.
An engineer standing in a room with a clown.