Oh the kicking under the rib kind of hurts. Or when they bounce off a full bladder, that kind of is uncomfy. ;) after the space in there gets tight and they get huge, it isn't as much 'fun' as the first few flutters.
But it is amazing to watch them roll around your stomach at night while you lay in bed. You can see elbows and knees roll past. Take video of that, because you'll miss it so much when it is over. After birth you just feel empty :(
congrats on the flutters. So exciting!