Some kids who played games about Narnia, got gradually balmier and balmier

Elena built Lucy's room from the opening scene of the C.S. Lewis book Voyage of the Dawn Treader, a book full of allegorical vignettes, largely dealing with the work of sin in our lives.

Overview of the room

Confrontation with Eustace

Waves come out of the painting

And fill the room, eventually sweeping the children into the world of the painting