On Christian missionary website “Superbook” aimed at children you find an inspired Q&A concerning
“How can God be be three persons and one person at the same time?”
“The best answer to this is that it’s a mystery! There are some things we can’t understand very well. But we know that they are true nonetheless. Many things that are true can be difficult for us to understand. …
… The doctrine of the Trinity is just like that.
While not perfect, a good way to imagine how the Trinity works is to consider how water can exist in three forms. Water can be a liquid, water can be a solid (ice), and water can be a gas (steam or vapor), but all three forms are still water.”
The missionaries’ aim:
“Discover how you can know God”
“We want kids … growing in their relationship with Jesus.”