If salt and pepper get mixed, it's hard to know which seasoning is which. However, by using static electricity, you can quickly separate the seasonings to create a pile of each. Whether you've knocked over your salt cellar into some ground pepper, or simply want to demonstrate the principles of static electricity, this time-honored trick separates the seasonings easily. Create an electrical charge to collect the lighter seasoning.
Rub a plastic comb against your clothing or rub it against an inflated balloon, if available. The rubbing creates an electric charge.
Hold the comb 1 inch above the mixture of pepper and salt, until the pepper clings to it. Don't lower the comb too much or the salt will also cling to the comb.
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Brush or knock the pepper off the comb into its own pile. Repeat as necessary to remove the rest of the pepper from the mixed pile.
This process makes a fun science experiment for kids.