Cover the spectrum of the four basic tastes: salty (salt water), sweet (sugar or honey water), sour (lemon juice or diluted vinegar), and bitter (diluted almond, coffee, or bitter chocolate extract) with this set.
Color-code the matching pairs with adhesive dots for "control of error." The 1-ounce amber glass bottles hide the color of the liquid, and the glass droppers clean easily. Ages 3½ to 6.
