Introduction

In this lesson we are going to build a robot which resembles a scorpion. Have you ever seen scorpions? Where?
We know that scorpions usually live in deserts. They feed on absolutely everything that crosses their path, waiting in ambush. An ambush means to suddenly attack someone or something after hiding and waiting for them. This technique was used billion years ago by The Tyrannosaurus Rex and today it is preferred by many species, including people.
But how does the scorpion hide in the desert?
Scorpions use their legs to make shallow holes in the sand where they bury themselves. Thus scorpions blend into the environment.
Can you notice the scorpion in the picture?

It is well hidden and is waiting for a bug to pass by so it can have a snack!