Take a ziplock bag and fill it with a bunch of baby oil. You can also add small objects like floral glass gems and a bit of glitter as well. Then, get as much of the air out of the bag as you can and close it. Use duct tape on the "ziplock" to help prevent leaks. The baby oil bags are cool because the baby oil causes pools of color which can be "broken up" with touch, but will form together again when they pools touch.