This spacious lounge on Deck 4 is called "Meerleben - Entdecken & Erleben" that can be translated as "Sea World - Discover and Explore".
To simplify: I would call it "Exploration Lounge" (#50)
This lounge occupies the place where Celebrity Central is on Celebrity Solstice ships.
It includes two deck high atrium - similar to Celebrity forward atrium.
Adjacent to Exploration lounge is The Atelier - a craft studio for kids. Next door are kids game room and lounge.
The installations in Exploration Lounge will remind you of museums of science and technology.