Baby Harry's blanket of stupidity.
So one day an extremely tired James potter accidentally loses Harry in the house for at least two hours after wrapping Harry in his invisibly cloak. Not many people know this but that was the real reason James allowed domubeldoor to borrow the cloak because he had never been more scared in his life then when he had to walk up to his wife and explain to her that he had lost the baby in the house in the span of ten minutes. Lilly was not pleased. James had been officially put on nappy changing duties untill he could "be more responsible" whatever that means.
Ghost lilly wasn't very pleased when Harry received that cloak for Christmas either. As much as she adored her baby. It really did seem that sometimes dumbbelldoor wanted Harry to get into the same shenanigans James had when he was at Hogwarts.
"AND NO JAMES MY WORRY FOR HARRY GETTING INTO TROUBLE WHEN USING THAT BLASTED CLOAK IS NOT UNBIASED OR FUNNY STOP YOUR GIGGLING THIS INSTANT!"