They are recommended for children ages 3 years and up (often shown on packaging as “Suggested Age: 3 Years and Up” or “3+").
Yes. Some items include light-up parts and realistic cooking sounds activated by knobs. Those interactive features require batteries (for example, one stove set uses 3 AA alkaline batteries).
Common materials listed across sets include plastic, metal, and polyester (for fabric items). Specific materials vary by product.
Many listings and reviews note these accessories are compatible with most 18-inch dolls and generally mix and match with other doll furniture and accessories.
Most listings specify no assembly is required, and some larger items arrive fully assembled out of the box.