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What a Byte Holds

Three short lessons on the counting inside every computer: binary on one hand, why a kilobyte was 1,024, and what twelve megapixels means.

For grown-ups, from what RobotPals teaches children at Spark & Anvil.

  1. Lesson 1Binary on one hand
  2. Lesson 2Why 1,024
  3. Lesson 3What twelve megapixels means
At the table · Two or more, ages 8 and up

Twenty questions to a million

You'll need: Paper and a pencil.

  1. One person thinks of a whole number from 1 to a million and writes it down, hidden.
  2. The others ask only yes-or-no questions, such as "Is it more than 500,000?"
  3. Count the questions. Halving the range each time finds it in 20 or fewer.
  4. Try a bad strategy ("Is it 7?") and compare how many questions that takes.
Where the numbers came from

A little history, and what nobody knows

The word

Werner Buchholz coined the word “byte” in 1956, while IBM was designing its Stretch computer, and spelled it with a y so it could not be misread as “bit”.

Early machines used bytes of several sizes; the source does not say who first settled on eight bits.

Source: Byte (Wikipedia)

Your child's ladder · on Spark & Anvil

The same idea at every age

  1. Ages 3–5Match the Lamps
  2. Ages 6–8Five Lights
  3. Ages 9–14Not made yet
  4. Ages 15–18Not made yet

Your child will meet this idea again at every age. The tools and courses here are the part for you.

Everything for a child who loves computers →

Print the guidebook (all lessons + the table activity) →