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(a psychologist and grandson of Maria Montessori) provides a fascinating insight into his grandmother's personality
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Materials not included
Pressure Cylinders Puzzle Map Australia (a psychologist and grandson ofThe pressure cylinders provide experience in pairing and grading degrees of pressure. By pressing the spring loaded plungers, the child senses the difference in resistance pressure. The material consists of a specially designed work tray containing six matching pairs of cylinders.
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