This study examines play in the Finnish home context by specifically concentrating on the forms of play, quality factors of play and social nature of play. It is of particular interest to study play especially of three-year-olds, because the research on play for this group, in home environment is scarce especially in the Finnish context. This study is part of longitudinal, multidisciplinary study (STEPS) and is based on the responses from 921 families who answered the questionnaires both at the study recruitment point and at three years. The data were gathered during the years 2011–2013 for the first time ever from the Finnish home context and are a basis for research to be done later. There is a need for this kind of descriptive and identifying study to understand play in the home context. The results suggest that play, and especially playing outdoors, had a strong position in children’s lives. Some forms of play were clearly gender-based and some demographic factors had a connection to the social nature of play. In addition, the level of participation in early childhood education and care was associated with play. No earlier studies have been conducted on the associations between participating in ECE and an increase in the sociability of play in the home context. Participating in ECE expands children´s social network and promotes possibilities to form friendships. In public discourse, the need to increase children's participation in ECEC has been strongly emphasized. This research supports these views.