When should I start life-skill learning like clocks, money, and shopping?

Life-skill learning (clocks, money, shopping) starts to match the child's readiness and the need in daily life, not the school grade. Once number basics (counting, more/less) are growing, begin little by little in real situations. Enter from the concrete: clocks from "visible time," money from "the meaning of exchange." Don't wait for perfect calculation—use practical methods like electronic money or step charts too. Prioritizing what's useful in current life keeps motivation going.