How old must you be to enter the attraction unaccompanied? Guests must be 18 years of age or older if they are visiting the attraction without a parent or guardian present. Related articles Are there any restrictions for children at Madame Tussauds Las Vegas? Do I have to pay for an under 2? What are your ticket prices? How do I get to Madame Tussauds Las Vegas by Car? If I visit for last admission, how long will I have in the attraction?