Instructions
Load "LittleBigPlanet," and enter "MyMoon" from the main Pod menu. Select to create a new stage, or enter an already existing one.
Open your "Popit" menu by pressing "Square," and select the "?" at the top of the menu. This will launch the first creation mode tutorial. Complete the tutorial by stacking the three blocks on top of each other.
Complete any new tutorials that appear, to unlock the "Peach Floaty" material. Many of the materials and tools in "LittleBigPlanet" are unlocked this way.
Open your "Popit" menu, and select the "Goodies Bag." Then scroll to the materials tab, and select the "Peach Floaty" material. Select a shape to place the material with, and then press "X" to add it to the game world.
Anchor the "Peach Floaty" material to something, by gluing or welding, or it will float away once you exit creation mode.