Teaching children how to break apart words into syllables is necessary in teaching them how to write. I watched dozens of youtube videos and I thought this one was the easiest to explain to my son.
The video is made by a group of kindergarten teachers.
After I watched this video I sat down and did the same demonstration explaining syllables to Ethan.
I also found a website that he can practice counting syllables. (this game doesn't work with Safari, but it does work with Firefox)
Here is the link.