Do I have to pay for an under 3? Children aged under 3 will not be charged a ticket for entry into Madame Tussauds London. A child aged 3 years or over will need to purchase a ticket for entry. Buy Tickets Related articles Are there any restrictions for children at Madame Tussauds London? How old must you be to enter the attraction unaccompanied? How much are tickets to Madame Tussauds London? What are your opening and closing hours? Why do I need to select a time slot with my Merlin's Magical London Pass or Combination Ticket?