This is taken directly from the website of an interactive cat toy:
"- Let your up-all-night cat play silently with this touch-activated cat toy
- Random flashing lights captivate curious cats in the dark
- Great toy to keep your cats occupied WHILE YOU SLEEP
Curb kitty's nighttime attention-seeking behavior with engaging play. Flashing Firefly Mat offers silent nighttime activity for cats of all ages. Enjoy undisturbed sleep while kitty is occupied with exciting nighttime entertainment. Randomly flashing lights silently dance in the dark to captivate curious cats. Touch-activated LED's (light emitting diodes) generate no heat and turn off when kitty is finished with play. Quietly blinks and entertains cats of all ages. Polyester mat with a charming nighttime scene of fireflies playing in a field measures 16-1/2" x 11" x 1/8" thick. Includes three LR44 1.5V watch batteries. "
"Please click on "More Information" for care instructions." and in "more information" it says: