Here's another way to look at: We give our children play experiences, as in they don't permanently live in a room with just a bed. We introduce them to blocks, sand play, play-doh, etc. things that many parents' would consider "proper play." I have chosen to introduce my child to not just legos and tea parties, but also to writing letters, completing mazes, learning to read. It's all play to her, there is no line. She's as happy digging around in her sandbox, as she is sitting at the table filling a paper with letters. We don't necessarily know what is play to a child, unless he or she is introduced to the idea.