The raisins were located on the highchair tray, so Will would climb up the step stool to grab a raisin.
Then he would climb down while little Ronnie anxiously awaited.
Then he would give his adorable little buddy his treat. :)
He actually was doing this without my prompting, but once he saw the camera he thought he needed to bring the raisin over to show me. That's why I tell him what to do with it. Note that he says "Aaahhh" to Ronnie as he gives him the raisin, apparently hoping to prompt him to open his mouth. I must have done this to him in times past.