Doing an experiment is fun and useful. You can answer a science question you might have.
You might ask:
What material will my toy car slide down the fastest?
What is the best shape to make a boat's sails?
What shape or materials will protect an egg when dropped?
How many balloons will lift a can of coke?
Where will a seed grow the fastest?
How can I make a tornado in a bottle?
There are so many fun experiments to