This website is a wonderful resources for people who stutter and their families. I encourage you to check out the section called "Just for Kids," as well as the section for parents.
Here are some ideas to support and develop your child's expressive and receptive language skills.
On this website, you will find videos about using Core Vocabulary, as well as free downloads of Core Vocabulary boards.
This website has worksheets for different speech sounds. Please contact me, if you have any questions about which worksheet to use.