My son is just starting to write more than one sentence at a time. Some of the frequent sight words (when, were, etc) cause him some problems. He likes his little "spelling dictionary" where he can look for the word he wants. Before I got this he would get frustrated when writing but that has reduced considerably. A good tool to use for begining writers. There is plenty of room to add other words as well.
I purchased this dictionary for my 1st grader and he loves it! He is so excited to get to use it and loves to add new words of his own. The dictionary already has lots of commonly used words listed and plenty of lines to add more. The only problem I can see is that once a child adds their own words, all the words will not be in alphabetical order... but this is acceptable. I would recommend this product!