You're never to early to learn the dexterity of sewing. Use a shoelace or piece of string to practice the in/out through the holes. Once your child has mastered that, they can learn to sew the button on. Practicing this dexterity it a great way to practice had-eye coordination and the skills needed for writing.
Care instructions: Wooden toys might leave oily stains due to its recent production, keep away from valuable items and preserve them in an eco-friendly carton box or wrapped in clean paper, or in a canvas/cotton storage bag. Never soak a wooden toy in water. In case it got dirty, just spray/apply a tiny amount of gentle organic cleaner, wipe with a sponge or washcloth and a bit of warm water. Ensure to air dry the toy before storing or playing. Every once in a while, you need to replenish the moisture in the wood with boiled organic linseed oil.