spacers

So I want to have spacers in my ears that have a miniture version of those old toys you could get from seaworld and other places, its like a rectangular piece of perspex and inside it is two liquids that dont mix together and one is blue and the other is clear, the blue mimics the ocean and there is usually a dolphin or other fish in it and when you move it around it looks like the ocean swell.... thats what I want in my spacers like a mini ocean with a mini dolphin in it. I dont know the name of what these toys are called so if anyone does that would be a great help, or if anyone knows of this idea already being put into ear spacers also could you let me know.