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Happy World Gratitude Day (21 September)! Our world definitely rocks and we’re celebrating it with this life-sustaining quiz. Can you get into the ozone and score a high five?

This quiz is tied up with a rainbow! Can you earn that pot of gold? Or have you bitten off more than you can hue?

Harness a powerful simple machine to launch some tasty treats. Safety: When dealing with food, use clean hands and clean equipment. Be careful with your catapult and make sure no one is standing where you’re aiming it.

Make a fountain that doesn’t need an electric pump. This fountain was designed by Heron, a Greek teacher and inventor in 1st Century CE. Safety: This activity involves using an electric drill, a sharp knife and a hot glue gun. Adult help is required.

Looking for some flying fun? This paper plane launcher gives your plane a speedy launch!

Two tubes, both the same weight and the same size, and yet slightly different. Can you guess which one will win the rolling race? Safety: This activity uses a sharp scalpel or scissors to cut a cardboard tube. Ask an adult to help.

We’re celebrating recycling in this quiz! Can you salvage a passing score, or will you end up in the garbage?

We humans only have 2 legs, but a lot of creatures have many more. Do you have the legs to go the distance and get 5/5 on this quiz?

Physics can be mouth-watering. Think of the sizzle as chips deep-fry. Turns out there are 3 kinds of sizzle sounds! Can you read this without getting hungry?

This quiz is all about waves. Will you ride it to victory, or will you wave goodbye to your high score?