Swing and trapeeze bar for tree

[TwoBees]

I want to hand a swing and/or trapeeze bar from a tree branch for DD. I have been looking at the Little Tikes and Step 2 disc swings, but would prefer a more traditional "seat" swing (not a toddler swing). Any recs for a swing, or experience with the Little Tikes or Step 2 ones? Any recs for a trapeze bar? Many say that they cannot be attached to a tree, only a swingset.

http://www.amazon.com/Little-Tikes-621239-Disc-Swing/dp/B004RSGCFI/ref=sr_1_6?ie=UTF8&qid=1337711225&sr=8-6

http://www.toysrus.com/product/index.jsp?productId=2333011

http://www.toysrus.com/product/index.jsp?productId=12288906