HASSLE FREE & SIMPLE TO SETUP THIS BIRTHDAY DECORATION KIT: The minimum recommended age - 3years and above. You can set this birthday decoration items up in 30 minutes, For your better layout of the scene, the product is equipped with an air pump and double-sided adhesive tape. After the celebration, the gas from the balloon can be released and kept intact, use it again for the next happy birthday celebration. String Lights and curtain net can be used for a long time.