Stump in the garden

Last night I was surveying my garden to be area while my 2 year old son played on a stump (which also has a huge tree trunk - one of the ones that will be going away) off the back of it. As I surveyed, I wondered how to incorporate the tree trunk int my garden design. I don't want to pay to have the stump ground down - I think it could be an interesting feature. 

A cole of thoughts I had:

1) the stump could be a natural container for planting, along side the beds like this: http://houzz.com/photos/3702803

2) it could be a sitting place 

3) as my two year old has already proven, it could be a natural play area/ mini jungle gym of sorts.

I love the possibilities! Just need to figure out ow everything will flow, both aesthetically and physically!