This passage is meant for Year 2 students. Could someone please edit it for me? Any suggestions to improve the passage are welcome. Thanks in advance.

Ricky was walking to the playground when he saw a coin on the ground. He picked it up and saw that there was a blue spot on it. He wanted to return it to the owner but there was no one around.

As he was walking home, he saw a beggar, so he dropped the coin into his bowl. The beggar said, “Thank you, little boy.”

The next day, Ricky’s mother asked him to buy some cans of food. He went to the provision shop. He asked the shopkeeper, “How much do they cost?” “Six dollars,’ said the shopkeeper. Ricky gave him ten dollars and the shopkeeper gave him four dollars in coins as change.
Ricky looked at one of the coins carefully. To his surprise, it was the coin with a blue spot, which he had given to the beggar. He decided to keep it because he believed that it was a lucky coin.
Ricky was walking to the playground when he saw a coin on the ground. He picked it up and noticed that there was a blue spot on it. He wanted to return it to the owner but there was no one nearby.

As he was walking home, he saw a beggar, so he dropped the coin into his bowl. The beggar said, “Thanks, son(ny).”

The next day, Ricky’s mother asked him to buy some cans of food. He went to the store ['provision shop' is geographically limited in its use-- it does not appear in online AmE or BrE dictionaries] and asked the shopkeeper, “How much do these cost?”
Three dollars and forty cents,’ said the shopkeeper. Ricky gave him five dollars and the shopkeeper gave him a dollar and sixty cents in change. [The cans seem a bit expensive, and so many dollars in coins seems odd].

Ricky looked at one of the coins carefully. To his surprise, it was the coin with the blue spot, which he had given to the beggar. He decided to keep it because he believed that it was a lucky coin.
Thanks, Mister Micawber, for editing the passage.
In Singapore one-dollar coins are common, and it is common for a can of food to cost two dollars.
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OK then.