Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to have a build a bear school [title] Clear an area in your room or closet. [step] This will be the area you use for your school. Make sure it's large enough for all the build-a-bears you'll be enrolling! [title] Gather necessary school supplies.

Ending1: [step] You can use materials you already have at home. You'll need : [substeps] A blue screen. Ending2: [step] There are a few things you'll need on the day of your school session : [substeps] A mirror. Make sure to get it very large enough so you can even stand and hold it all the way in front of you. Ending3: [step] See your school's supply list. Include things like shoes, handbags, maybe throws. Ending4: [step] Choose items like rulers, pencils, pens, paper, folders, and binders. And choose other items you think would be good for school.

Answer format: ending1/ending2/ending3/ending4