Go beyond laser pointers! Each LASER Blox™ projects a brilliant ray of light that is visible without messy fog or powder. The snap-in lens converts the dot of light into a traceable line. Powerful magnets allow for secure stacking or magnetic whiteboard use. Whether individual or stacked as a ray box, LASER Blox™ is an exciting addition to physics or physical science class studies of light waves, optics, and lasers.