Above is what started it all. Isn't that great? Small, colorful, and easy to make yourself with relatively few supplies. She joined the circles using split metal rings, which I had no idea you could buy! I'd always see them in the old capiz shell lanterns & imitiations, and wondered where I could get my hands on some. For the full tutorial, head over to Small Shop Studio. You'll also find a ton of other nursery ideas on that page, if that's what you're looking for.
The tutorial got me thinking of a variation in the technique. If you don't feel like connecting the circles one by one with a ring, I imagine you could pull the sewing technique from many paper garland tutorials. Like sew (ha!):
During my search, I found a few other ideas that I thought I'd share, while we're on the subject. Take this tutorial:
Polka Dots on Parade!
Here's an entirely different take, a look I haven't seen in a long time, waxed tissue paper:
Green Wedding Shoes. You can see the technique for stacking the dots horizontally, which is a lot easier than you'd think. Another horizontal stacked mobile is this one, from Dwell Studios (and is for sale if you don't feel up to the project!):