To make a continous red line
This puzzle features a series of cubes, each with a red line on them. The objective of this combinatorial puzzle is to assemble the blocks such that a continuous red line appears around the outside of the cube. For more fun and different levels of challenge, a variety of shapes can be made, each with the same challenge of making a continuous red line. Designed by Georg Pfäffinger and made in Hevea wood by Philos. Philos is a German puzzle manufacturer that started in 1996 as a manufacturer and distributor of toys. They make a wide variety of wooden puzzles, as well as some less common strategy games, playing cards, and dice.