Class 5 moves from following algorithms to inventing them: search strategy on the Balance mat, navigation on the City Map, rotation in the head, and the question behind all of AI — do I have enough information to decide?
It opens on a binary search finding a hidden number in a few checks, then climbs the hardest ideas in the range — nets, mirror and water, rotation, sufficiency — to a gold summit.
One player — the Balance Master — secretly picks a number. The other can only ask the balance: left heavier, right heavier, or balanced? Children discover for themselves that halving the possibilities beats checking one by one. That discovery has a name in computer science: binary search.
Forward, quarter-turns, half-turns — navigate a city from the traveller's point of view.
Rotate shapes mentally, then predict punched holes before unfolding. Test with real paper.
Tap to flip. Class 5 cards ask children to judge information itself — enough, not enough, which parts needed. It's the most exam-relevant skill in the kit, and the most AI-relevant one too.
Mirror images, water images, nets, series, sufficiency — Class 5 modules overlap heavily with reasoning questions children later meet in school olympiads and entrance-style tests. Here they meet them as games first.
Each kit stands alone. Early cards in each module warm up the idea before the difficulty climbs.
The Full-Journey Bundle covers Classes 3→5 at ₹2,997. See the bundle →
Ages 9–11 · 80 cards · Balance Search · City Map · Rotation Compass · Fold & Punch Lab · workbook · guide.