First we defined Noun (a person, place, thing or idea) and threw out examples. Then we defined Verb (an action). Then we linked them together as a game that goes like this:
I announce - Noun: Ben. Verb: Climbs.
Ben acts it out by climbing the doorframe.
Mom: Noun: Ben, Verb: Jumps.
Ben jumps down.
We played this for a few minutes and it became limiting... so we had to add Direct Object.
DO: Snack Bag
I didn't actually define Direct Object but they quickly figured out what it meant in context. :-)