Iris has finally acquired a cell phone—her first. Cathon would love to help her learn how to use it, but Iris insists on figuring it out all by herself. How did people communicate before the telephone was invented, anyway?

Iris and Cathon are shocked to discover how big and heavy the first microwave oven was. Turns out that inventing it involved melting a bar of chocolate.

Cathon bakes Iris a very special kind of bread for her birthday, and pretty soon the two friends have gone down the rabbit hole, in search of the origins of bread. They even tell the tale of a whole army sculpted from bread.

Cathon has a new best friend—Ruben the goldfish. Iris’s latest hobby is fishing. A fine kettle of fish to be sure. The fishing rod is an amazing piece of gear, but where did it come from?

Cathon has borrowed her aunt’s camera and wants to take some nice pictures of Iris. But she discovers that her best friend isn’t particularly photogenic. The two pals explore how people preserved memories in the past.

Iris wants to send her grandfather a birthday card. Touching, right? But Cathon doesn't want her friend to raid her collection looking for a stamp. Did someone really once pay $9.5 million for a single stamp?

Cathon has found something wonderful in the recycling bin—a birdsong clock. But Iris isn’t totally on board with her friend’s taste, so she seeks a compromise. She wonders how people told time before clocks.

Cathon proudly shows off her new glasses. Iris is at a loss for words—she’s speechless with admiration. Where do eyeglasses even come from, and how did people first get them to stay on their noses?

Iris is about to greedily devour her lunch—a mountain of fries—and her friend gives her a lecture. In Cathon’s opinion, fries are not a balanced meal. And yet they’re in Canada’s Food Guide. Or are they? Maybe not.

Iris and Cathon are at the beach, and they both have new swimsuits. Cathon makes fun of her friend’s choice of beachwear. You’ll learn a lot about the origins of the bathing suit.

Iris loves noodles so much she could eat them morning, noon, and night. Cathon prefers using them to make little gifts for her friend. Any idea where noodles actually come from?

Iris believes that every time you turn the lights on or off in a room, it costs 25 cents. Cathon sets her straight, and then explains where the light in lightbulbs comes from.

Iris wants to help out by doing Cathon’s laundry, but accidentally shrinks her friend’s favourite pair of pants. When were trousers first worn? And is it true that women were not always allowed to wear them?