It's described differently by different people. But basically at first it feels like little gas bubbles or something. Soon though, you'll feel the baby get stronger and stronger kicking you harder and harder....

I've felt it one time and it felt like somebody touched me very gently with their finger, only from the inside. I thought it was very different than gas. But i'm only 17 weeks so its not regular or strong yet.

Hey at first it was like little gas bubbles or flutters, like twitches, then they get stronger like hard kicks and youll be like omg! Like with me, the baby kicks alot! (she kicked right now) and sometimes it hurts cuz she kicks so hard for being 6 months! But youll know when you feel it!