My son stutters; would love some advice

My son stutters; would love some advice My 5.5 year old always stuttered a little (as well as my 10 year old but he kinda just stopped on day when he was younger) My 5.5 year old seems to be getting a lot worse over the last couple weeks with his stuttering. I’m just trying to figure out what exercises I can do with him or if there’s any apps. Ect to try. I try to remember some of my practice but it’s been dang near 25+ years since I had a speech class. He seems to have the “cluttering and word initial stuttering” as I had the sound based and initial.. any advice would be awesome. He doesn’t start school till this fall so speech therapy would be started there as well.