Think of a Number

儿童

S1 E1 Materials

本集简介

Johnny Ball looks at family trees, boomerangs and nylon, and turns a fossil back into a dinosaur!

下一集

In this edition, the theme is water. Johnny Ball considers icebergs, soap bubbles, model divers and John Lethbridge's early diving bell.

当前季

哇，窗口太小啦