Let the children be free, encourage them; let them run outside when it is raining, let them remove their shoes when they find a puddle of water; and when the grass of the meadows is damp with dew, let them run on it and trample it with their bare feet; let them rest peacefully when a tree invites them to sleep beneath its shade; let them shout and laugh when the sun wakes them in the morning.

Maria Montessori, The Discovery of the Child