Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to build hamster toys out of household items [title] Gather together several popsicle sticks. [step] The number of popsicle sticks that you will need will depend on how tall you want to make the ladder. [title] Rinse off the popsicle sticks to remove food residue.

Ending1: [step] Use more water once you're happy with the size of the sticks. [title] Draw the popsicle stick shape on the cardboard sheet. Ending2: [step] The stickiness of food residue could make it difficult for your hamster to walk on the ladder. [substeps] Allow the popsicle sticks to dry completely. Ending3: [title] Put the 3 popsicle sticks together into a bundle. [step] As your hamster reaches the top of the center bundle it will continue to stack each one on top of a neighboring stick. Ending4: [title] Grab the popsicle sticks and make hamster bars out of sticks. [title] Shape the bars in rope or connect toothpicks with the glue.

Answer format: ending1/ending2/ending3/ending4