This stirred some sweet memories for me.
Right at the top of that list is when my son (now 47) was about 20 months old. After the excitement of opening gifts and playing hard all morning, it was nap time. He was exhausted and didn't fight the nap, but he wanted to take something with him. Somewhere (I couldn't locate it today) I have a snapshot of him curled up in his bed in a t-shirt and undershorts with new red insulated mittens on his hands and a Tonka Jeep clutched to his chest! Sooo cute!