To get this simply find all five radios hidden around the Hub and interact with them by pressing
. All of the radios, except for one are found near where the different Guardian trial areas are.
1) Found to the left of the lower level house right near the initial spawn part of this world.
2) Head all the way to the left to Anne's area and near the right of the checker-board table with the alarm clock on it is the second radio.
3) Head all the way to the right. The radio is right next to the dancing robot-guy.
4) From the 3rd radio double jump on the red bounce pad and head left to the tree house area. The radio will be inside the treehouse on the bottom left.
5) From the 4th radio activate the fox-switch spin disk by using
. This will lower a drawbridge. From there continue all the way to the left until you see the wrestling-cowboy Yeti. The radio will be to the left of him.