Sometimes the cookies stop working for me. I mean, how many Oreos can one eat, really? So I move on to dark chocolate covered peanut M&M's. The kids will also work for swedish fish. Though for them I just try to pick a random number and have them pick up that much stuff at a time. Usually how old they are. My husband has them work from their age backwards (pick up 8, then 7, then 6, etc...) before getting a treat. Sometimes I'll go in and say I'll just pick up the trash, or just my daughter's things, or just the blue stuff. Makes it a bit more interesting. Biggest to smallest works well too. When you pick up the biggest things you see an immediate difference. Of course I'm saying this while avoiding doing anything to further my own incredible mess! Oh well, off to sneak an Oreo!