Thank you, Jimmy Fallon, for the fun idea…
Materials: A carton of [cheap, non-organic, NOT farm fresh] eggs.
Instructions: Hard boil some, and leave some raw (we hard-boiled eight of twelve), then allow your kids to discover which are which by cracking them over their heads– ala Ramona Quimby.
We conducted our experiment: 1) outdoors, 2) before showers, and 3) in night-before jammies.
Waste not: We ate the hardboiled ones for breakfast… and they say egg whites make a terrific all-natural deep conditioner.