I like the mineral lamps with fishing line where mineral oil drops down and it looks like rain.
They call those "rain lamps" or "oil lamps" and I don't think they are made anymore.
I've made one out if a lava lamp once a long time ago. I don't remember the type of oil I used but I do know it wasn't vegetable oil. It had a really Low boiling point. It was cool when I put the food coloring in and switched the type of bulb it used. It was good.
I am talking about these: https://www.youtube.com/watch?v=XeujiTWUcGs
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