How did you learn about how to count syllables? I learned to place my flat hand horizontally under my chin and say a word, how many times my chin touched my hand... was how many syllables the word contained. Try it, it does work! Now, you can end up adding extra syllables into words because of how you say the word or saying it to slowly or putting emphasis on spots that don't have them.... but overall, if you just say the word like normal..this trick does work.
I have used this for my own boys as they work on their writing lessons from Grandma because she has where they look up dictionary words and must write down the number of syllables in each word as part of it as well as creating a sentence, etc. When we learned about haiku and they had to create their own haiku's, they used this trick.
It goes back to my emphasis that if you give kids some creative tools for learning, they will stick with them for life and always have a good base for understanding!
Now, how many syllables does the word "supercalifragilisticexpialidocious" have?
Try the chin trick and see!