A ball launches. You watch it arc, then place a marker where you think it stops after bouncing and rolling.

Pure physics intuition — no maths, just feel.

A grid of tiles flashes in sequence. Repeat it back from memory.

Each round adds one more tile. How deep can you go?

Marbles pour into a jar. The lid drops. Guess how many it holds.

Numerosity, not counting — your brain is worse at this than you think.