What is the treasure in Horrible Histories Terrible Treasures

In every era, when you get all 6 map pieces, you complete the era. You then get a password. Complete all 4 eras and you can enter the time sewers. Win the minigame and then you get the treasure/prize!

The minigame involves hitting 4 coins across a table. Score 1000 or more to win.

For those of you who are lazy, the passwords are:

Tudors-mould
Romans-pie
Egyptians-foot
Middle ages-fish

The prize is a...