• ✓Three primaries plus white and black — five pots, a palm each
• ✓Every colour that comes out has its own Thai name, and says it aloud
• ✓Four rules a child can test and find hold: same pots, same colour; white lightens; black darkens; all three primaries make brown
• ✓Every combination up to four pots checked, and pouring order never matters (npm run verify:colours)
• ✓Free play has no target at all and tips out with one tap — nothing here can be wrong
• ✓Paint a picture with the colour you just mixedplanned

✓ = done · ☐ = planned. Every game is built one step at a time like this.