We usually take a walk or go preaching!
Sometimes we also go on a trip!
Like water park, amusement park, sometimes we go to grandparents house too!

"The men who minister in a fine manner are acquiring for themselves a fine standing and great freeness of speech in the faith.​" — 1 Timothy 3:13

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We usually take a walk or go preaching!
Sometimes we also go on a trip!
Like a water park, an amusement park, or sometimes we go to my grandparents' house too!

= "Like water park, amusement park" is missing articles. In English, singular countable nouns usually need an article ("a" or "the").
= "grandparents house" should be "my grandparents' house" if you're talking about your own grandparents. It also needs the apostrophe to show possession.
= Great job!