That's ace! I put Gregory's pellets in a treat ball - it has a hole in so that when he rolls it with his nose and hands they drop out. That keeps him busy for all of 10 -20 mins each day trying to retrieve it from under the sofa etc! Nothing like as creative as cluttery drawer though!
He also enjoys digging a towel in the corner, and going through tunnels of cardboard and digging in shoe boxes filled with paper!