Will other substances work the same as salt does in the 'lava in a cup' experiment?

Yes, other substances can produce similar effects in the 'lava in a cup' experiment by altering the density and solubility of the liquids involved. For instance, sugar or baking soda can create a reaction when mixed with vinegar, producing bubbles and movement. However, the specific visual and physical effects may vary depending on the substance used, as salt is particularly effective at creating a distinctive lava lamp-like effect due to its solubility and density properties.