The 3D illusion mirror effect
The 3D illusion mirror effect is produced whenever there are two parallel reflective surfaces which can bounce a beam of light back and forth an indefinite (theoretically infinite) number of times. The reflections appear to recede into the distance because the light actually is traversing the distance it appears to be traveling.
Recede to infinity
It is extremely fascinating for young children. They not only have fun but also learn the principles of reflection, circuitry and more!