If you don't receive the information about the concert children's tickets you bought, you can take the following steps to solve the problem. First, check whether the contact information you provided when purchasing tickets is accurate, including mobile phone number, email address, etc. Secondly, check your junk mail or junk mail folder to make sure that any relevant information is wrongly classified. If no relevant information is found in the above steps, it is suggested that you directly contact the concert organizer or the customer service department of the ticketing platform, provide your order number and ticket purchase information, and ask them about the specific situation of children's tickets. They will be able to provide you with accurate answers and help.