Just read a great article about overparenting, a subject I could write and write about. One of the smaller points it makes is that letting children play on their own actually helps the brain make more connections and grow more than if you always play with them and facilitate their play. This, in fact, "causes their nervous systems to literally shrink." Whew! Finally support for not feeling guilty for cleaning the kitchen rather than getting down on the floor with the duplos. My instinct has been that playing on their own is good for them but I so often override my instinct with the social pressures and other voices in my head, a thing that makes me nuts.
It's good to have support.