Wait until your kids are older.
What's the point here? Then you'll need another car?
Remember, we're comparing to iPads. Apple intentionally hobbles them to induce demand for multiple iPads. This isn't a question of being allowed to own multiple iPads/cars. It's a question of being artificially prevented from owning a single one.
The point isn't that you have to commit to being a single-car household for life. It's that at some points in time, you can be.
If they are European, they learn to get by with public transport, bikes and such.
I was already on my thirties when I got my first car.