Ocean-themed puzzles, coding challenges, and maths adventures — from age 4 to 14.
Free, self-paced STEM learning for ages 4–14. No timers, no leaderboards, no pressure.
Every child learns at their own speed.
Quality STEM for everyone.
No accounts, no tracking. Ever.
Genuine computational thinking.
Shore (0m) — Memory, alphabet, and colour games at the water's edge. Ages 4–7.
Reef (50m) — Coding, maths, and logic puzzles in the sunlit shallows. Ages 8–11.
Abyss (200m+) — Binary systems and number sequences in the deep dark. Ages 12+.
Last updated January 2025.
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No cookies, analytics, advertising pixels, or third-party tracking of any kind.
Achievement progress is stored in your browser's local storage only, and is never transmitted anywhere.
Fully compliant with COPPA and GDPR-K. We do not knowingly collect information from children under 13.
Please refer to our privacy policy for any questions.