We really enjoyed using the baby pool this spring and LOVED that it was free and easy to use. My 8-year old son submitted a guess under the pseudonym 'Darth Vader' (with his location as 'Death Star', obviously). He is a rather scientific young lad, so he guessed his own birth weight and height (since that's the size baby I have) and the due date (since that's what the doctor predicted). Surprisingly enough, my daughter was exactly the same height and weight as my son, and born only a few hours before her due date. So in the case of our baby pool, Darth Vader triumphed but everyone was still happy.Thanks and best of luck!'