Wow! That's quite the project to do for a 7th Grade Project. I myself am a 7th grader:twothumbs so take all this with a grain of salt as i have never actually tried anodizing
. From what I understand is that it really isn't to expensive as long as you have a car battery charger. It might be overkill for aluminum foil but will probably work. What you'll need is:
Car Charger
Battery Acid
Aluminum foil and wire
Some kind of Dye(Rit will work if you can find It)
Soap and water or degreasers to clean the aluminum before Anodizing
A 2 pans that you can boil in.
And a Bucket and rubber gloves.
First you'll need to make a mixture in the bucket that is 2 parts acid and 1 part water. Make sure you pour the water in first and then the acid.Then make a negative ground with the aluminum and wire. You'll want a flat shape that you can put near the bottom of your bucket. You will clip that to the negative end of the car charger. Then take a wire and connect it to the foil that your anodizing. Connect that to the positive part of the car charger. Make sure that none of the copper ends on the charger are in the solutions. Once the parts start to fizz, take them out about 10 to 15 minutes later. You'll have to experiment with how long you leave it in. Make sure you turn everything off before you take them out. Rinse whatever you anodized in cold water.
Now you'll need to make your die solution. Make it very strong and and heat it up to a low heat. Make sure its not to hot or the aluminum wont take the color. Dip the part in and take it out when it is slightly darker than you want it. Have another pan full of clean boiling water and dip the part in so that it seals the color in. The water leaches a tiny bit of color so that is why you make it darker than needed.
Now for Titanium, I don't really know much on that. You can not use the same process as this for titanium so take a look a Sgt. LED's links. Hope your project goes well.
Chris