Over at Redbubble, Immy Smith (aka Cartoon Neuron) has a collection of happy-Volvox-themed stuff (click “Available products” to see the whole glorious collection):

Women’s relaxed fit t-shirt by Immy Smith (aka Cartoon Neuron).

Drawstring bag by Immy Smith (aka Cartoon Neuron).

Samsung Galaxy Case/Skin by Immy Smith aka Cartoon Neuron.
Adorable. I especially like the Diatoms t-shirt, and so I added that to my list of things to buy one day.