Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to build a mouse maze [title] Think about the purpose of your maze. [step] Before you begin designing your maze, you will need to think about what you are hoping to learn from it. Different styles of mazes will challenge your mouse in different ways and teach you different things about its behavior.

Ending1: Here are some things to consider before assembling a maze. [substeps] Is your maze part of a series of maze-like structures? Many mice don't have much difficulty making clues and connecting the maze to the other side of the maze. Ending2: Placing your mouse maze on a flat surface will help to create detailed details. [substeps] Even if your maze does not have small plastic walls, they will still need to be covered with layers of a foam sheet so that they do not break with a wear and tear. Ending3: [substeps] You may want to see how fast your mouse can complete the maze and whether or not its performance improves over time. In this case, you would want to build a maze with only one end-point. Ending4: [substeps] Never build a maze using a boiler boiler, despite the shapes of the boiler conducting the water in the boiler. Use a boiler that is made of ceramic or rubber, not just wood.

Answer format: ending1/ending2/ending3/ending4