I have been using this one both my children since they were born, and it works so well. My youngest is a red head with very fair skin and this is my go to for when we are swimming or playing outside in general.
My pediatrician recommended that we not go OVER 50 on my until he was older. The concentration of chemicals is higher in the higher SPFs, and since their skin-to-body ratio is higher than ours, they absorb more of the chemicals. My husband and I use the 50, but still use a mineral sunscreen on our son.