As countries adopt computing education for all pupils from primary school upwards, there are challenging indicators: signicant proportions of students who choose to study computing at universities fail the introductory courses, and the evidence for links between formal education outcomes and success in CS is limited. Yet, as we know, some students succeed without prior computing experience. Why is this? Some argue for an innate ability, some for motivation, some for the discrepancies between the expectations of instructors and students, and some-simply-for how programming is being taught. All agree that becoming procient in computing is not easy. Our research takes a novel view on the problem and argues that some of that success is inuenced by early childhood experiences outside formal education. In this study, we analyzed over 1300 responses to a multi-institutional and multinational survey that we developed. e survey captures enjoyment of early developmental activities such as childhood toys, games and pastimes between the ages 0-8 as well as later life experiences with computing. We identify unifying features of the computing experiences in later life, and aempt to link these computing experiences to the childhood activities. e analysis indicates that computing prociency should be seen from multiple viewpoints, including both skill-level and condence. It shows that particular early childhood experiences are linked to Permission to make digital or hard copies of part or all of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for prot or commercial advantage and that copies bear this notice and the full citation on the rst page. Copyrights for third-party components of this work must be honored. For all other uses, contact the owner/author(s).