I assign each kid with a number. I have three daughters so I usually go backwards so dd1 is #3. Then I use a small notebook and just number the pages #1 is youngest DD and so on. I do not write down what Ive bought exactly, I use code. So if I bought a Bratz Doll, I would write Btz and the price. So if they do find the notebook, they wont understand it anyway! Then to hide the packages, I just wrap them. I dont put tags on them until christmas eve so if they do find them, they wont know whos is whos but I do because Ive numbered them in a spot on the package theat they wouldnt notice! Usually where Ive taped the package