A Quora user posted the following question: "What are cool and inexpensive home science experiments I can do to blow my son's mind?" He got a bunch of great answers, including this video of a girl explaining how to suck a hard boiled egg into a bottle. She is delighted with the results, and I laughed right along with her. Other ideas include a homopolar motor, collecting micrometeorites from your roof, and making a pickle glow.
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Mark Frauenfelder is the founder of Boing Boing and the editor-in-chief of MAKE and Cool Tools. Twitter: @frauenfelder. Come and hear Mark speak at the ALA conference in Chicago on July 1.