Comes in an assortment of bright fun squishy colors Yo-Yo finger loop at the top of the puffer ball Extremely soft, dangly spikes and cute white eyes Flashing LED lights inside make it flash with red green and blue colors Turns on when smacked / Turns off automatically after around twenty seconds of flashing Super soft and dangly rubber mouse with little beady eyes and lots of soft long spikes. Insert your finger into the loop and enjoy this fun yo-yo mouse which begins to flash once smacked, and turns off automatically after a bit of time! LED's light it up with blinking lights. Fits in the palm of your hand. Comes in assorted colors. You'll love squishing this thing as much as bouncing it up and down on its cord. Total diameter (with spikes): 4 in. Batteries are non-replaceable.