Silly kitties! It is likely that you can't really protect them - this sounds like a lesson they need to learn all by themselves. Kittens and kids just need to get banged up a bit to learn.

Just watch out for things like blood on their head or ears, or holding their heads at funny angles, or walking with a wobble or not in a straight line. These things could mean a kitten got hurt on that last romp around the room!

Good luck, little kitties! And don't scare your human so much!