Part 1: Jimmy determines to create a perfect snack: sour, creamy, sweet, chewy, etc. - all at once! When he finally gets the formula right, the snack turns out to be too perfect ... and everyone in Retroville becomes hopelessly addicted to it! Part 2: During Botany class, Miss Fowl accidentally swallows a seed from Jimmy's DNA-accelerated spinach plant. This has the unforeseen consequence of turning her into a 50-foot plant creature that threatens the citizens of Retroville. Inventions: ElectroMagnetic Radiation Multiplier, Hieroglyphics Translator, DNA Accelerator, Toaster Window Washer, Toaster Newspaper Deliverer, Toaster Make-Up Applier.