Some describe first baby kicks to feel like flutters, gas bubbles, tumbling, a light tickle, a painless "zapping" feeling, a light flicking, or a gentle thud or tap. As baby grows, movements will become much more pronounced and you will feel them more frequently. Instead of tiny pops, you'll feel jabs, punches, rolls, and pokes. As for feeling movement on the outside, you'll likely have to wait until late in the second trimester or early to mid third trimester.