When I nannied, the boy I cared for was very close in age to my oldest. I would herd them both to the car simultaneously (or carry one and hold the other's hand) and put them both in the car. Then I'd buckle in one while encouraging the other to be a big kid and climb into their seat on their own.
~~AngelaS~~
Mommy to 3 girls: A, G and M. (15, 11 and 8.5)
The education of all children, from the moment that they can get along without a mother's care, shall be in state institutions at state expense.
– Karl Marx, "The Communist Manifesto"