Rodeo Ron 'mosies' into the town of Cavity (yes!) with his four colourful cows - red, yellow, green and blue. The people in Cavity burp all the time and have terrible teeth, and this is all down to Frothy and Fruity's soda bar, where the sodas are full of sugar and carbonates. Ron tries one but isn't impressed - whereupon Frothy and Fruity challenge him to a 'shake-off'. They do their best, but can't compete with Ron's remarkable cows, who each produce a different flavour. After Ron rides the red one as she bucks and shakes (ferociously and very funnily), he milks strawberry milkshake from her. The yellow one produces banana, and the blue one blueberry. The green one produces 'the finest drink ever' - plain milk. Frothy and Fruity get in a fight and explode because of all that fizz inside! This would be great fun for the surgery waiting room, and children will learn something about nutrition as well as what is best for teeth. The pictures are super, full of colour and imagination.