As promised, here is our 4th and final challenge from Nintendo as they celebrate the release of Mario Kart 8 on the Wii U.
In this challenge, the girls worked together to design a new weapon to knock opponents out of the way during a Mario Kart race.
And in true girly style they designed the Necklace of Fury!
The pretty jewels look innocent but they hide a powerful secret. These sparkly accessories double up as fearsome weapons of destruction!
Throw them backwards or forwards to knock your opponent out of the way or get them off your heels!
The three princess each have their own stunning beaded jewellery whereas Mario, Donkey Kong and the gang each have a super cool medallion displaying their initials.
How cool are they?
Well done girls :)