Dr Margaret Lowenfeld understood children - how they think, how they play, and how they manage pain and grief. From these insights she developed her own original theories and methods. She pioneered projective play therapy for unhappy or disturbed children. She invented tools to enable primary school children to discover for themselves basic mathematical principles. Her methods do not rely upon words and language and have been fruitfully employed in cross-cultural research.

The Dr Margaret Lowenfeld Trust was set up to maintain and develop her legacy.