do you think i can DIY a lava lamp?

hi! I'm an art student working on my art installation for the year, and I got this gumball machine. my original plan was to make it into a regular lamp, but I wonder if there's any way to create a lava lamp in it? the globe is glass and the base is cast iron i believe!

hi! I'm an art student working on my art installation for the year, and I got this gumball machine. my original plan was to make it into a regular lamp, but I wonder if there's any way to create a lava lamp in it? the globe is glass and the base is cast iron i believe!