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? Can I redeem my 2 for 1 voucher online? How old must you be to enter the attraction unaccompanied? Can I use a 2 for 1 voucher at Madame Tussauds London? What is my time slot?