gloved fingers, then the glove (once or twice) then a small dowel followed by varoius sized and weighted sticks/small logs, then the dumbells. Once the dog is moving up and down the table it is pretty much all dumbells as they are easy for the dog to pick up, yet the still have to commit to putting their head down to the table. Towards the end of the table we introduce bumpers and birds (they are still getting these before and after each session).
Once on the ground its the dumbell, but quickly move to the various sized bumpers for walking fetch.
Thats the short version.
Cpayne