I got this as a present for my daughter who is one year old. Daughter says she loves it. She loves to hide in it and be found. loves tunnels. Apparently it takes a lot of balls to fill it and if it's not filled a piece will collapse so be aware. I gave her the normal amount of balls that were part of the 'customers who bought this bought that' promotion. Miracle Space Balls. I probably want to get twice as much.