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Logic puzzle · 5 skies · 50 puzzles

Star Switch

Every tap flips a star and its neighbours: lit stars go dark and dark stars light up. Think ahead, light the whole sky in as few taps as you can, and discover real constellations.

  • Ages 7–10
  • Logic
  • Cause and effect
  • Strategy

Little sky

Puzzle 1/10Stars 0

  1. Puzzle 1
  2. Puzzle 2
  3. Puzzle 3
  4. Puzzle 4
  5. Puzzle 5
  6. Puzzle 6
  7. Puzzle 7
  8. Puzzle 8
  9. Puzzle 9
  10. Puzzle 10

Keyboard: arrow keys move between stars, Enter or Space taps. Point at a star to see which stars will flip.

Goal: light every star

Taps0Fewest1

Tap a star. It flips with its neighbours. Light up the whole sky! 6 stars shining, 3 to go.

Star Switch puzzles Little sky

Each tap flips a star and its neighbours. Colour in the circles you would tap to light every star.

Star inside = lit. Empty circle = dark. Name: ______________________

  1. Fewest taps: 1My taps: ____

  2. Fewest taps: 2My taps: ____

  3. Fewest taps: 2My taps: ____

  4. Fewest taps: 2My taps: ____

Answers (tap the filled circles)

How to play

  1. Tap a star. The star you tap and the stars right above, below, left and right of it all flip: lit stars go dark, dark stars light up.
  2. Peek first. Point at a star or move to it with the arrow keys: dashed rings show which stars will flip.
  3. Fewest taps win. Every puzzle can be solved. Match the fewest taps for three stars. Stuck? Hint shows one good tap.
Tap the middle star: it lights up together with the stars above, below, left and right. Tap it again and they all go dark.