We have our six kids in a Honda odyssey with the small seat between the captains chairs. They're pretty much the same ages as your kids with a three year old added in. Using travel vests (we have ride safer brand) rather than boosters makes it much more manageable. It creates space, allows the kids to switch seats, and makes it easier to reach the belts. They're a bit of a hassle to use at first but the kids are used to them now.
1/27/14 at 2:46pm