By Geneva Sands - 02/13/12 04:28 PM EST
The first question she tackled on CNN's iReport, a series of Web videos where guests answer questions directly from viewers on an iPad, asked the first lady how she stays fit and healthy.
For the gym-averse, Obama recommended turning on the radio and dancing, an activity she said she enjoys with daughters Sasha and Malia.
Up next was a young boy named Shayan Fazli, who said his "favorite healthy snack" was Goldfish crackers and asked to know President Obama's top snack choice.
Obama admitted that her husband has a "weakness" for guacamole and nachos, but left the young boy with a reminder to "keep eating your vegetables."
She told iReport that she tries to teach "balance" to her children when it comes to eating.
"It takes a lot of determination, a lot of will power. We have very clear expectations in our house and sometimes 'no' has to mean ‘no,’ " she said in response to Shari Atukorala from Sri Lanka.
To showcase her second year trying to fight obesity and promote healthy living, Obama embarked on a three-day tour last week around the United States where, in addition to speeches and meetings, she danced with a stadium full of kids, ate at an Olive Garden and participated in a tennis match.