Ok, let me make this more clear because you seem to be upset with the answers I'm receiving. Heehee61 is actually the EXACT situation I'm describing, she just happens to have one more child who didn't ride.
My child is 2. He is almost 40inches. There are rides that only 2 people can sit on (parent and child). We are a family of 3. I'm asking if this is the scenario for ride swap: We wait in line as a family OF THREE. The 3 of us reach the ride, only 2 people can sit on the ride (let's say Dumbo). Myself and my son ride Dumbo while my husband waits. My husband ALSO wants to experience the ride with our son. ARE WE ABLE TO THEN SWAP ONCE THE RIDE IS OVER (or get a pass to come back) SO THAT MY HUSBAND AND MY SON (who just rode the ride,with me) CAN EXPERIENCE IT TOGETHER?