Cold War @ What Does it mean ?

Kids chose this topic to kick-off and understand what cold war meant and what it means to be at wat without actually fighting one !

Things to ponder

Where did the word cold war appear for first time ?
What is a cold war ?
What is Space Race ?
Concept of three worlds?
What is star wars?
What is Nato?
What is warsaw Pact?
what is iron curtain ?
East / West Berlin ?