"Exploring and trying out what this new Dome has to offer, of course!" So basically similar to how he's always been since arriving in Marina. Although now he's in a far better mood. But really: even more new foods, alcohol (maybe even some of the drugs, but he doesn't need to say this!)
"Have you seen that 'amusement park' place at all? It's where that massive wheel thing is. Ah- the museum is very curious, too!"