I have just one, but he's an 8 year old now. I think if I had stayed married I would have had at least one more. He has always been more reserved and shy and I think part of that comes from not having many kids to interact with when he was younger. But he also talked very young, started at 10 months, was using small sentences by a year, and hasn't stopped talking since...lol. I credit part of that to being a single mom, I talked to him like an adult sometimes without even realising it. He is a great kid, I think as with anything though, there are pluses and minuses to being an only child.