This was possibly the most enjoyable aspect of our visit. I would advise doing Nickelodeon Universe during the week. Similarly, I would recommend avoiding it on the weekends. During the "Off-season" (February) we had little trouble getting on to every ride, and re-riding many. It was a blast!

Beard Papas

Rainforest Cafe

Nestle Tollhouse

Walburgers

Carlo's Bakery

Fair on Four

Great Wolf Lodge is an indoor water park resort that offers a variety of activities, like Arcade, Magi-Quest, Children's "camp" activities, Ropes Course, Rock Climbing, Gemstone Mining, Build-a-Bear, Restaurants, and so forth. 

We enjoyed our time at the Crayola Experience in the Mall of America. However, we felt that the $179 price tag for six tickets was a bit too steep. We would have rather spent that money on crafts that we could have used over a longer period of time at home, or even on another day at Nickelodeon Universe. Although if we lived near the attraction, a season pass might be worth purchasing due to the repeat adventures.