Quadrature of the circle
Tell your audience about the great unsolved scientific puzzles, such as the quadrature of the circle, that scholars have pondered for centuries. At the same time, you show a large ring. You blow on it and like a flash it transforms into a square. It’s that easy to do!
The trick is also called Circle to Square or Squaring the circle.
65,00 kr.
In stock - Shipped in 1-2 business days