It depends on what type of kaleidoscope you want to do. There are simple ones and than there are very complex ones like Paula Nadelstern make. I have made both and enjoyed them. If you want to do the kind that uses the Kaleido ruler the secret is to sew from the outside to the middle. If you want to do Paula Nadelstern, have lots of patience. Here is a picture of one I did. It is about 27" square and has over 300 pieces. If you've never seen a Paula Nadelstern, google her and look at those on her website. They are incredible!