The students of The Nature of Things school visited the Weizmann Institute of Science in an activity organized by the Davidson Institute. GENTLE was there to open them the gate to other geometries.
If you were that day at Weizmann and would like to read and experience more:
Euclid’s Elements: http://aleph0.clarku.edu/~djoyce/elements/elements.html
Non-Euclid (Javascript with 9 activities): https://www.cs.unm.edu/~joel/NonEuclid/
Non-Euclidean geometry (GeoGebra + Tilings): http://www.malinc.se/noneuclidean/en
Spherical Easel (for spherical constructions): https://easelgeo.app/
You are also welcome to comment to share your experience or ask any questions: