Recently I tried to use simple things to have some abstract fun and catch nice pictures. Effects:
Probably with macro lens would be even more inspiring, but I used 24-105mm lens.
For those pictures I used clear glass rectangular tall container, filled with water and then food coloring was added. Behind container I put white big reflector, you can also use nylon material, or white shower curtain attached to backdrop stand. Behind this I put flash, so out off camera flash trigger is needed. Whole setting looked like that:
Then I had fun with dish soap, food coloring and vegetable oil which made interesting patterns on water. I used rectangular clear casserole dish, under the dish some space was required too put flash and come colorful paper, which made a background.
Nothing complicated, but nice to have creative fun with things you can easily find at home.