Can be done locally with two controllers or over PSNThe other players do not need to remain in the game the entire time but be there when the thermometer is above 30%From the main menu head into the Pod controller and scroll right to 'My Moon - My Levels' and select a space to create/edit.
Note: Creating a world with a pre-set template will help to increase the thermometer before you begin.Once in the world add items from your Popit to build up the thermometer to over 30% full (Larger the item the better)
Once done press
and save the level to earn this and
The Creator trophy in LittleBigPlanet worth 24 pointsBuild and save a level with the thermometer more than 30% full