Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to build a maze for your rabbit [title] Create the base of the maze. [step] Lay out a flat piece of cardboard to use as the base floor. Choose a piece as long as the maze you want to make.

Ending1: A good size to start with is two feet by two feet. As you perfect your maze-making skills, you can get more adventurous with bigger sized mazes. Ending2: Print this out on construction paper, and lay it all out on a flat surface. [substeps] Ensure that you have a spot in your maze for your rabbit to make lots of space. Ending3: [substeps] The base is symbolic and represents elements important to the rabbit's environment. It can be as small as a stake or even a cardboard box. Ending4: For example, if you want to make a spiral maze using cardboard, use 16 strips of cardboard. By using longer strips, the maze is less stable and less likely to run out of space.

Answer format: ending1/ending2/ending3/ending4