I am going to go to Children's Grand Park this weekend. I want to ride a roller coaster and a merry-go-round there. I also want to take as many pictures as possible. I think it'll be a lot of fun.
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Would you check this passage and correct any errors, please?
"I am going to go..." -- that wording is repetitive. If you delete "to go," the sentence will be fine.
Everything else is fine.