An oscillating object moved past the eye will appear in multiple, optical clones strobing across your field of view like the doppler howl of a speeding Ducati receding in the distance. Tiny button-cell batteries feed power through an oscillation circuit to a single old-school red LED on either side of the Yomega Strobe-Yo. Switch them on by brushing your fingertip across two sensitive pairs of electrodes, and fling it to the bottom of its string, where it sleeps like a flatlined cat, its circuitry's cosmic red staccato throwing untranslatable Spirograph semaphores in the darkness to a unfathomable and as-yet undiscovered alien audience. Then again, it is just a toy.