Well we always start with 4 then see how much room is left
Here’s 4 kids in the box and 1 riding them around. Hey, that’s more kids than our car can take!
3 kids and one giant fluro-kid on the Eastlink ride (the tollway was closed to traffic for a day)
not really a challenge, but 2 on the back gives them oodles of room, just like business-class
even uncle mick will jump on for a bakery run (as long as we stop at the bottle)