Blog post Plus Advent Calendar Door #20: Trisecting the angle with origami Solve a very old problem using paper.
Blog post Plus Advent Calendar Door #19: A (nearly) impossible object Read about the amazing mathematical journey that led to a strange object with a will of its own.
Blog post Plus Advent Calendar Door #17: Einstein and relativity Find out about the theory and Einstein's struggle to formulate it.
Blog post Plus Advent Calendar Door #16: Sixy snowflakes Explore the beautiful symmetry of snowflakes and create your own paper versions.
Blog post Plus Advent Calendar Door #15: Florence Nightingale and the power of pictures Florence Nightingale and the power of pictures.
Blog post Plus Advent Calendar Door #12: Where can you visit? Can you visit everywhere in this mathematical road trip?
Blog post Plus Advent Calendar Door #11: Sticky note beauty! Make beautiful maths with your sticky notes!