Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to keep your baby's room warm [title] Let the sun in. [step] If it is a nice sunny day, especially one where the sun shines into the room, leave the curtains open for some natural light and heat. The natural light will be good for your baby, and cost you less money than running various heating appliances.

Ending1: [title] Decorate the room according to your child's favourite feature. [step] Whether it's a playroom, a gallery, or even a private room, surround it with comfort items. Ending2: [substeps] If there are tree branches in front of your windows, you can consider trimming the branches to let more light into the room. Just make sure the trees are on your property, and you aren't cutting down someone else's branches. Ending3: [substeps] You can also protect your baby's room from strong drafts, like thunderstorms or cold temperatures by also leaving windows wide open. Avoid using fans, because doing so will damage the air circulation and cause your baby to get more heat in the room. Ending4: [substeps] For placing light in the room, consider leaving a few small lamps in the room for your baby. If you have a giant bed, consider leaving a few baby seats or baby toys scattered around the room.

Answer format: ending1/ending2/ending3/ending4