This pocket puzzle is a fun fidget toy that comes apart somewhat easily but requires considerable thought to reassemble. Inspired by the swirling shapes of the milky way, Galaxy can flex and flutter to create pleasing geometries as it rotates in three dimensions.

One specific configuration will allow you to separate the four pieces. But remember, the universe tends toward a state of chaos, hence Galaxy is much easier to take apart than it is to put back together. Before disassembling the puzzle, pay careful attention to the ways the circular arms fit in the cylindrical sleeves to create a flexible assembly.

A playful, attractive and challenging design from Bram Cohen from the United States.