✦ Lesson 2
Inventions get better
Inventors often use new ideas, new materials and technology to change and improve old inventions.
Measuring length
🪢 string with knots→📏 wooden ruler→📐 tape measure→🔴 laser measure
Early people measured with a string with knots tied in it. Today a laser beam can measure a room in a second!
Computers and robots
💻 Computers
Much smaller, faster and more powerful than the first ones, and connected to each other.
⌚ Smartwatches
A tiny computer on your wrist: you can even pay with it.
🤖 Robots in medicine
Some robots help doctors operate, following what a computer tells them to do.
🤔 Think about it
What inventions do you use every day? Choose one and imagine how it could be even better in the future.
🔧 new materials + technology = better inventions