Sound-activated movement–yell, talk, sing, clap, or play music The louder you yell, the faster they go Each cuddly Yellies, spider has a distinct personality Watch Yellies pets’ eyes light up and legs move as they respond to your voice Product Description Yellies are the cutest, fuzziest pets that respond to your voice. Each Yellies pet has its own distinct look and personality and is full of fun surprises. Voice and sound-activated, they respond to talking, yelling, clapping, singing, or even music. The louder you yell, the faster they go. Find your favourite.