The Thermometer

The Thermometer is a thing that appears in LittleBigPlanet, LittleBigPlanet 2, LittleBigPlanet Karting and LittleBigPlanet 3. It is an indicator that appears on the left side of the screen at all times in Create Mode. The Thermometer keeps track on how much gadgets and gizmos you put into your level as it will eventually go up the more you add to it. Eventually, if you make too much, it'll overheat and prevent you from adding anymore.

The reason why the LittleBigPlanet series has this indicator is because that's the pressure in which beyond the level will become unplayable and possibly end up freezing the game. Luckily, there are a lot of ways you can keep your level from overheating.