# Home 23 · Find the tray part

**Try one tiny turn.**

Prepare: Paper/words only, or safe familiar scale with an adult.

Invitation: MODEL empty tray 55 g, tray plus pieces 235 g. Find the contents and check by addition; optionally observe a real zero state separately.

Adult worked model/check: 235 − 55 = 180 g;55 + 180 = 235.

Choice and boundary: No bodily mass, food policing, medicines or heavy handling. A model is not a weighing result.

Usual communication, exact scribing, private/untimed work and stopping are welcome. Keep a model answer separate from your child's own attempt; do not correct it silently. Observe one useful reason and choose a new unrelated example if wanted.

[Pick another home turn](../parent-start.md)