Redo What Has Been Undone

Riddle: You buy me taken apart, To redo what has been undone; Four of my pieces have one sharp corner, The rest of them have none. What am I?

Answer: A jigsaw puzzle.

Source: https://www.riddles.com/index.php/2022

You buy me taken apart,
To redo what has been undone;
Four of my pieces have one sharp corner,
The rest of them have none.
What am I? — Redo what has been undone by Morgan Foster v1.

Riddle: You buy me taken apart,
To redo what has been undone;
Four of my pieces have one sharp corner,
The rest of them have none.
What am I? Answer: A jigsaw puzzle. — by Morgan Foster v2.