"I'll Huff and I'll Puff"

"I'll Huff and I'll Puff And I'll blow your Watermelon skin wall down" said the big bad (Lennon) Wolf!
After dinner this afternoon we had a large watermelon, delicious but, in Lennons case, very messy!!
Dhylan collected some extra sections of the skin and built a wall, goodness knows why but he's ten so that's a good enough excuse.
I'm not sure how it started but we all tried to blow it down, successfully at first but after he'd modified it we couldn't get it to fall over.