Ahhh. I just got an idea

Ok.....so since i was thinking about cars.....I'm gonna do an experiment on engines.
I want to use different energy sources of the same amount to run an engine and see how long it'll run for.
I'm very sure that the experiment will be reliable because I'm controlling all the variables.
It will be conducted fairly in that all the energy sources will weigh the same.
This experiment can be done repeatedly and will not take more than a few weeeks altogether.
I'm buying my own "Make an engine kit" for $29.95 and using sources such as petrol, windpower. etc.
I'm sure this will conclude in a nice fashion.
Thankx and bye.....

OMG!!!

Ok, I noe that I just posted like a second ago but I got an amazing idea!!! Ok, it's not fully formed yet so dont judge me but something to do with tunnels and plants???? Or tunnels and CARS!!!! Even better. I'll get back to you when I'm certain. But definitely TUNNELS!!!!!

Thinking about what to do!!!

So far, i've had quite a few ideas about what experiment to do, but I just can't decide. I want to do something to do with mould and I've got a few things that I want to do.
1. How mould grows at different temperatures and in different environments.
2. What different kind of moulds grow in different ares.
I've got other topics in my mind too.
3. How long to white-board markers last on different fabrics.
I still haven't got a major idea yet, but I'll get back to you when I do!!! Cya!!!