Can Children be unaccompanied by the LEGOLAND Castle hotel pool? Children under the age of 14 must be accompanied by a responsible adult at least 18 years of age. Children under 48 inches must wear a provided life jacket. Was this article helpful? Related articles Are children allowed in the Castle hotel lounge areas? What Children's amenities do you have at the LEGOLAND Castle Hotel? Do you have a pool at the LEGOLAND Castle hotel? What is the Dragon's Den Restaurant and Bar? Is the LEGOLAND Castle hotel pool heated?