When we are packing for our holiday, i made a checklist just incase i forgotten to bring anything. I've segregated our checklist to "ours", "children", "medicine & supplements".
When Samuel saw the checklist, he too wanted to bring his stuff along. He kept reminding us to bring pen & paper so that he can do drawing. While busy packing, Samuel consistently reminded us until he stopped telling us. I then noticed, he has included it in Our Holiday Checklist.