Eating Flour

I heard him in the kitchen coughing and gagging a bit so I went to check on him. I found him in the baking cupboard using a measuring cup to scoop out wheat flour. He was covered from head to toe and had a mouthful of flour he was trying to chew and swallow. I couldn't tell if he was enjoying it or not. I didn't even realize he could get into the flour. He probably just discovered it himself. I don't know if I need to lock up the cupboard or if it was a one time curiosity-spurred experience.