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Today (July 13) is the birthday of Ernö Rubik, the inventor of the Rubik’s Cube. He was born in Budapest, Hungary and created the now beloved toy while he worked as a professor of design at the Academy of Applied Arts and Design in Budapest in the 1970s. He’s now engaged in encouraging students to study science, mathematics and problem solving.

We love encouraging problem solving too! Here’s a challenge from our book Family Science.


What you need:

  • 5 small household objects
  • A piece of standard size paper
  • Scissors

What to do:

  • Collect at least 5 small household items.
  • Choose 3 from your collection.
  • What is the smallest opening you can cut in a piece of paper so that all 3 items will fit through, one at a time, without ripping the paper?
  • Once you’ve cut your hold, return the 3 items to your collection.
  • Give your paper to a friend or family member. Challenge them to find the 3 items you used.

Have fun!