A classic way to pass the time, this Spiral Tube Liquid Drop Timers Set contains three spiral tubes contains three large cylinders with fat spherical colorful droplets that roll in a line down a spiral staircase. Whether used as a fun classroom tool for timed activities, a relaxing activity in the sensory room when things get hectic, or a brief break on the desk in your office, these drop timers are ready to go with just a flip.