What if you could find some seaweed-looking fabric? :)

or gravel looking?

Could you find some fabric with bubbles to go in extra blocks. So it would look like the fish are blowing bubbles! Love it so far. Be sure to show us what you come up with.

What about something that looks like seaweed?

That is really cool. The cubes look like little mini aquariums.

How about coral, seaweed, or fishnet types of material?

Or anything fish tanks usually have in them.

They boggle the mind to look at. Very cool. If I had to fill in I would pick something in the hues in the fish scene like aqua or in the greens. Just my opinion.

Very cool! I am planning a hollow cube as one of my next projects.

What about starfish, seahorses, coral, along with diver. treasue too! My grandsons quilt is made from that fish fabric.

This gave me an idea for something I want to make my daughter. Thanks. Great blocks, great idea.