If you're looking for a good Bible study idea that doesn't require lots of extras, you might be interested in this. Rand suggested it to our students the last time we were at camp, and I tried it this summer.
It's this: Go through the book of Psalms and write down every attribute or promise of God. You can use a computer or write things down longhand or tailor it any way you please. Just look for the statements about God. You will be amazed at how many you find. So far, through Psalm 96, I have written down 12 pages, front and back - that comes to over 620 attributes and promises, with over a third of the book yet to go.