You know card houses? Kids build them out of playing cards. It's a challenging task to build a card house because everything has to be balanced in order for the house to sustain itself. The cards themselves are pretty darn strong. It's not easy to randomly rip cards (though you can do it and you can certainly cut the cards with a scissors).
Building a card house on a slippery surface is not easy. Most of the time it works better if you have something with which to ground the house (a rug, a placemat, a towel, or tablecloth - anything with some texture). When you start to construct the walls, you have to balance the cards against each other.
You can spread out and/or you can build up. Building up is the more exciting approach but it is also the more demanding approach. Building any card house takes patience. Building a multi layered card house takes patience and calmness. But most of all it takes determination and tenacity.
The thing is that each card plays a part in the house and, even though each card is strong, and even though the house may be build on a non slippery surface, it is a fragile creation. It can easily crumble. Brush your fingertip past it and it collapses. The cards are still there. The cards are each individually strong. But the house is in shambles. Then you have to decide if you want to rebuild the house or put the cards away.
You know card houses? Kids build them out of playing cards. It's a challenging task to build a card house because everything has to be balanced in order for the house to sustain itself. The cards themselves are pretty darn strong. It's not easy to randomly rip cards (though you can do it and you can certainly cut the cards with a scissors). 
