Sometimes you just stare. It might not be anything interesting to the outsider, but to you the subject is a playground for your eyes.
For me, it’s often a fire.
The flames jump, change color, grow smaller or reach higher. Sparks may even fly off.
My brain swirls while my eyes are occupied with the show. Thoughts waft in and out. Problems are contemplated–sometimes even solved.
Fire has a meditative quality. The bubbles in a drink may hold the same for you.