Space science

Space Signals: a free science game for kids.

Space Signals turns astronomy facts into probe missions. Kids route signals by connecting clues about planets, moons, orbits, rotation, gravity, rings, comets, and galaxies.

What kids practice

• Recognizing planets and space objects.
• Understanding rotation, revolution, gravity, and orbit.
• Connecting the solar system to the Milky Way.
• Using science clues to eliminate weak answers.

How to play

Choose Space Signals from the Discovery world on the arcade menu. Kaiden Arcade runs in the browser and stays free, ad-free, account-free, and purchase-free.