You thought those single color jigsaw puzzles were difficult? Try putting together one where the pieces change colors! That's just what the latest offering from artist Clemens Habicht does:
1000 CHANGING COLOURS is a colour gamut jigsaw puzzle of 1000 pieces in which each individual tile has two distinct colour states from intersecting gradients of colour. Printed in Poland using a lenticular lens, the colours change depending on the angle of view, resulting in a radiant iridescence that shimmers in beautiful colour combinations.
Pre-order it now for $100 plus shipping.