Ambigrams, education, math, puzzles
Katrina / Ori Heffetz (English/Hebrew + lake reflection 2010)
Tomoko Fuse (Geometric construction, 1996)
Tree (Animation, 1981)
Tron
Invisible Site (theatrical title 1992)
Computer Graphics (180 degree rotation, 1988)
5 barriers to spreading joyful mathematics — and how to overcome them
Joyful Mathematics — What it is and how to spread it
Can you solve for X?
