Max and I used to share toys (玩具) with each other. But things became different when he got a model car from his grandma on his birthday. He didn't even ask me to touch it. I was so sad that I decided to buy one.
I told my mom about it, but she didn't agree. I talked to her again and again, and finally we made a deal (协议). I would clean the recyclable rubbish bin (可回收垃圾箱) in the kitchen for 10 days. If I could do my job well, Mom would buy me a model car. It didn't sound like a big deal, did it? I said yes even before my mom finished her talk.
However, I made a mistake on the first day. There were three big bins of different colors in front of our house. I opened one and threw the rubbish into it. When I was about to leave, I found that was a red bin for common rubbish. I didn't know what to do. Then Mom came out and helped me get all the rubbish out and put it in the yellow bin. When everything was done, Mom said, "It's OK to make a mistake, but be careful next time."
I did carefully from then on, and finally I got my model car. It was my great work that helped me get it. My heart began to sing when Mom handed it to me!