Can I upgrade my Theme Park Only ticket to a Father Christmas ticket? Yes, head here to upgrade. Please note, children with a Father Christmas Ticket must be accompanied by an adult with a Father Christmas ticket. Related articles Which rides and attractions will be available throughout the LEGOLAND at Christmas event? What is the Theme Park Only ticket for the LEGOLAND at Christmas event? Can I use my Merlin Annual Pass or Merlin Monthly Membership during the LEGOLAND at Christmas event? Do I need to buy a parking ticket for LEGOLAND at Christmas? Where can I purchase tickets for LEGOLAND at Christmas?