In the heart of Amsterdam city, at one of the places with highest fine particle air pollution this enclosed paved schoolyard has been turned into a playful green oasis. Together with surrounding neighbours, children and teachers we tackled the diverse challenges: noise, pollution, rainwater inundations, heat stress . The schoolyard now has a playable wadi, a mud kitchen, herbal gardens, a willow island for rainwater buffers, contains urban agriculture, an outdoor class, discovery bushes, a worm hotel and so much more.