Take my boys to Legoland!

These are my two sons, They are the sunshine in my world! We have a wedding to attend in Arizona come September that happens to fall upon the weekend me eldest son turns 9. My SO and I would really like to take them to Legoland for his birthday! When we asked him what he wanted for his birthday all he said was he wanted to go to Legoland, please help his birthday wish come true!!