Everyone more or less laughed and made fun of special children (and also "weird" or "abnormal" people) at one point in their lives, you'd be lying if you deny that.
My question is,
Why do we laugh?
Is it because it is genuinely funny, thus we laugh?
Is it to make ourselves better? if so what's the difference?
It is genuinely funny because they aren't normal.
Is there something wrong with that?
That child is special and innocent. They don't even want to be in that kind of situation so you better not make fun of that child because that is too rude. Remember that we are all created equal in the eyes of God and laughing at an innocent child aren't make you perfect. You better have concern about that child because they also deserve to be respected. They deserve to be loved as well and we must be sensitive about it.