On today's show: Teen mechanics build an electric car, a deadly scientist sends free books to kids, koalas get their own tartan, world leaders make a big mistake at an important event, and a very clever green thumb grows a fruit salad tree.

QUIZ QUESTIONS:

1. Where will the girls' car source its electricity?

2. What is the name of Corey Tutt's organisation?

3. What does the colour green represent on the koala tartan?

4. What country is Karine Elharrar from?

5. What is a peachcot?

BONUS TRICKY QUESTION:

What is the current world record for the most different types of fruit on one tree?

ANSWERS:

1. The sun (solar power)

2. Deadly Science

3. Gum leaves

4. Israel

5. A cross between an apricot and a peach

BONUS TRICKY ANSWER:

Five