This understated mobile celebrates the works of Danish physicist Niels Bohr, who developed the revolutionary model of the atom. To mark 100 years of this significant scientific development, the Danish Flensted family worked with the Niels Bohr Institute of Copenhagen to create this stunning mobile. The mobile's components represent the atomic nucleus center and orbiting electrons. Made of stainless steel and wood. Hangs 11" tall by 11" wide. Comes fully assembled. Made in Denmark.