Dear User, We are sorry to hear that you are facing issues with the parental lock (numbers). Please select 4 even numbers that are multiples of 2, like 2, 4, 6, 8, 10, 12, 14, 16, etc. If you are facing an issue clearing this lock, please write to us at reachout@playshifu.com, and we'll help you further on the issue. Sincerely, Team PlayShifu.