I have a book basket out always

A large dollhouse (about 3 ft high)

I have an Ikea rectangular table out and then rotate what I put on the table i.e magentic pom poms and a cookie sheet or some magna doodles etc.

I always have a few large cars out i.e Barbie cars and dump trucks that the kids like to drive around and load up with toys.

A box of dress up clothes

A box of Duplo lego

Then I have the Ikea Trofast storage bins and wooden system so that the kids can take stuff from there and put it back as they wish.

This lady has a good set up http://youtu.be/AVf091gMjXY

Kind of interesting to see what she did for ideas