As per request by Anne. I have put together some sentence editing interactives and resources. If anyone has any please feel free to add to it.
Three games to help you practise making simple sentences.
Several sentence structure games please preview because some are dead links
Sentence structure games preview for age relevance
Sentence structure activities
Okay I tried the scholastic news link and the game Edit Dan's Copy looks good for 4th or 5th grade. Here's the link:
When I was teaching English, I enjoyed using the interactive exercises at Grammar Bytes which includes some for sentence structure. Handouts (PDFs) are also availabe at this site.