Charlotte and the Smashed Eggs

Lady Slipper,

While you ate your boiled egg this morning, we learned the story of our pioneer grandma Charlotte:

She was a teeny tiny baby when she was born (only 3 pounds) and she was born the same month as you (On the 28th of March). 

When she grew bigger, her parents met some missionaries and joined the church of Jesus Christ of Latter-day Saints.

"Mean people sometimes took eggs and threw them at the missionaries but she ran in front of the missionaries and the eggs got her instead of the missionaries." (Lady Slipper)

One day she went on a ship across the water to get to the promised land just like Nephi did.

Your questions after the story:
Why did she have to cross in a boat?
Why wasn't a big bridge?
Why couldn't she swim across?
How come she couldn't  walk across stairs either?
Why didn't God tell Nephi to build a bridge instead of a boat?

Love,
Mom

PS
starflower was listening too while she ate her baby cereal.