Have you checked the listing for the lounges that you plan to use, to see if they have a policy regarding free entry for children?
Children: Applicability of Lounge access for children varies according to each specific Lounge’s policies. Therefore the Customer is advised to check the Lounge description provided within the ‘Lounge Finder’ link in the Program email for specific child-related provisions prior to using the Lounge access. Inclusion of children with regard to eligibility for the Lounge is at the discretion of the Lounge involved.
LoungeKey is operated by the same company as Priority Pass. The lounge attendant knows nothing about the terms of your membership. The lounge will not collect a guest fee, but they will record the number of people in the party, and any guest fee will later appear on your sponsoring card.
Use of Lounge: When presenting the Means of Access on entering a Lounge, Customers are required to inform Lounge staff that they wish to enter the Lounge using the Program by referencing “LoungeKey”. Lounge staff will verify eligibility to enter the Lounge by checking the Means of Access visually and then electronically recording the Means of Access through a card/code reader, or otherwise entering the details into a secure system. Lounge staff will also enter the number of guests, if any, accompanying the Customer. If requested, the Customer must sign the card reader screen. The electronic record of the Customer’s Means of Access will be considered valid evidence of the Customer accessing the Lounge.