// Grade 1 · Sound Explorer
Change one thing about your mouth.
Hear a different sound appear.
Discover that every speech sound is made by a specific mouth shape. Tap creatures, hear their sounds, and watch where your tongue and lips go. Open the IPA chart anytime.
Mutate — change one feature
Sound plays with your browser's voice. Curious why these sounds pattern? Open the IPA chart or ask the tutor.