Now this must be fun!

Princess Cruises passengers are now using Nintendo’s new Wii Fit system, just added the Wii Fit balance games following their U.S. debut last month.

Family competitions will be held on board at venues including the Movies Under the Stars poolside screens, found on five ships. Youth and teen centers will also offer younger cruisers the opportunity to participate in Wii Fit activities.

NCL earlier this month announced it would implement Wii Fit on its ships in late July or early August.