For those of us with shy fish, the ultimate challenge is providing somewhere for our beloved pets to hide and feel safe. My CK had taken to trying (and failing) to hide in the plants, that's when I had an idea. My son's sandcastle bucket (that he never uses, we don't have a sandbox lol) makes a neat little "cave" for my fish, plus, they're cheap, and this one is a lovely shade of lime green so it matches the plants. 
Just thought I'd share.
Just thought I'd share.