There is a fine line between creating a magical childhood and ensuring your children know what is real.

For example, how do you explain that dinosaurs were real, but dragons are not? That blue whales and giraffes exist, but unicorns are imaginary? That bats are real, but vampires are not.

We have spent time explaining that bears can sleep the whole winter, that caterpillars can dissolve into soup and emerge as butterflies, that geese can navigate across continents, and that some lizards can grow back their tails.

But humans can’t learn to fly.