Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to make a guinea pig toy [title] Take a piece of string. [step] Depending on how tall your cage is, make the string is long enough for the guinea pig to reach it without hurting itself. [title] Find a carrot that is suitable for the guinea pig.

Ending1: [step] Give it a wash and a quick dry. Poke a small hole in the middle of the carrot. Ending2: [step] This will be either pink or yellow. Make sure it's big enough for the guinea pig to stand up and move around on. Ending3: [step] It may be big enough and will have two legs. This will be the main part of the guinea pig's cage. Ending4: [step] Make sure the carrot is soft as using a pair of wire or thumbscrews can damage your guinea pig's delicate skin. [title] Cut the carrot in half lengthwise.

Answer format: ending1/ending2/ending3/ending4