Think of wage as the way grown-ups get a special kind of sticker for doing their jobs. Just like how you might get a star sticker for cleaning up your toys, grown-ups get money for doing their work. This money helps them buy things like food, toys, and clothes.
Another way to look at wage is like a reward. When you help your friend by sharing your toys, you feel happy and your friend might say thank you. When grown-ups work, they get a thank you in the form of money, which they can use to take care of their families and buy things they need.
Imagine a magic jar that fills up with coins every time someone works. The more they work, the more coins appear in the jar. This jar of coins is like a wage. It shows how much work someone has done and helps them do important things like pay for a house or buy a yummy ice cream treat on a hot day.