@Selvia Good start, Expand a bit more on what “interesting toys” might look like. Could you give examples, or describe features that would be fun?

Colorful pens:

Aesthetics：colorful, easy to hold
Cost: 0.5 yuan / pen, cheap and useful
Customer: refugee, any ages and gender, everyone can buy it because it's super cheap.
Made by plant, healthy and friendly for environment
Strong tinting strength: drawing anywhere
safe
middle size