I was - once I worked out how to Tombstone him without hurting him! It was a shame really - I'd throw him around a bit, then Tombstone him, then pin him down till I got my breath back - and he loved it! He used to volunteer to stay in with me rather than g out with his mum to the shops. He's in his 20s and about 6 foot tall now, so I couldn't do it now. 
@Cerulion, if you were my brother, I'd have thrown you about like a rag doll - my brother only has 5 sisters, so we had to toughen up a bit and be a bit more 'brotherly' with him. So, wrestling, playing football, that kind of thing. And dad taught us all to box, for self-defence. 
You just need to adopt ambush techniques on your nephew now lol imagine the shock/surprise look on his face if you just launch at him
you'd just need to watch out that he doesn't automatically lash out in defense, that could end badly or painfully or both lol.
I only have one brother but all the men in my family are football nuts, so I was brought up with it, playing it and watching it, I'm told my first word as a baby was "Goal!"
Dad was delighted, mum was gutted at the sign of things to come lol. I played football with the junior boys club for a few years, it was pretty rough and I had my fair share of scraps
so much so that my parents ended up with the saying "If it isn't broken or bleeding, you're fine!" I had to leave when I got a little older and facilities weren't available for a "girl" 
Dammit R2, I see the bunny now too
It has a hint of Pikachu too...........I need more coffee obviously lol.