What age was your DC when you noticed they had a lisp?

[usedtoreadbooks]

Am curious because DD, 19 months, has recently been talking in a way that made me wonder whether she'd have one. She has 6 front teeth, 4 up and 2 down, and is talking in the odd phrase but more usually in spurts of babble, or using recognisable words of 1 or 2 syllables. I'm not worried about it but wondered whether your DC lisp and if so when you first spotted it?

My DD has just turned 2 and she lisps at the moment. My DS has speech therapy and I asked the therapist at his last appointment. She said its normal at this age. I can't remember when I first noticed it though.