1 When you give your children their birthday presents in two-installments over the course of 8 months.
2 When you taunt your children with birthday presents two, often three years before you intend to give them their birthday presents.
I was totalling 'Pulling a Mojang' on my kids the other year. I told them in the fall of 2019 they were getting their coolest birthday presents ever. Too bad they don't know they're actually getting them in the winter of 2022.