Bacteria and Fungi are probably the most fancy organisms around. At least they can be found in many different sizes, shapes and colors.
The pictures show some
diffent bacteria. They were put together on these plates to illustrate
the diversity. Bacterial colonies may be 'hairy', really round or even
shining. I've done the experiment your describing and found many different
bacteria, but you'll have to be a bit lucky. A good way is to 'dilute' the
bacteria, so the slower growers won't be outgrown. To do so, make a single
streak with the first tissue. Then take an metal spatula (but a small metal
fork will do too) and hold it in a flame for a few seconds. Make a second
streak with this fork, as shown in the next picture. (etc.)
There are many ways to study bacteria. The best you can do is use a microscope and study your bacteria. You'll see all different kind of shapes and sizes.
Hope this helps,
Regards, and goodluck,
Rolf