It's not unusual for kids to develop a stammer when they're younger and the other people telling you to wait a couple of years aren't necessarily wrong. Since stuttering has a genetic component it isn't weird either. You need to realize your child isn't sick or has some weird disease with a need for curing. One thing you can do is help him with his coping mechanism, those are a bit problematic. As someone who experiences the same stammer as he has (the push kind) i recognize what he's doing. The scrunching up, forcefully blinking, red turning face are all things I can relate to. Him elongating the first part of words is actually a really helpful technique that guides him through these hard words. Don't discourage him to do this. Do you recognize anything different about his breathing pattern? The pointing and hand gestures are okay, but just another way to escape the problem at hand. Every time he stammers you just have to be there for him, telling it's okay etc. Meanwhile, you are his number one role model, maybe it's time you study up on stammering. I get your children are advanced for their age but you can't burden your kid with too much at the age of 2. So in the meantime, just be there for him, study up and help him with his coping mechanisms. Don't be surprised if his stammer gets worse once he doesn't scrunch up his face anymore or any of the other things. This is normal. Maybe do some reading out loud once he goes to bed, have small conversations at the dinner table when you're both prepared to focus. Look at which sounds he is struggling with.