[aqh88]

You need to 1 solid level of preferably at least 2x3. Upper levels can add some but they are not counted into the initial space. Your smallest level for each boy needs to be 2x3 and then you can have extra levels. Pigs can't get up speed and popcorn very well when there's a ramp in the way to go up or down or when their space is divided into 2 small sections instead of 1 large one. They have to cut speed and they really need a straight line of flat space to popcorn without hitting anything.