What is the most expensive gift you've got for your child?

Right now, think the most expensive is my time with them. Growing up time is once a lifetime and no money can buy this at all. The bonding time you have with the kids and seeing them growing up in their milestones are the precious moments you can ever experience. If it's in terms of monetary, then I think it would be their insurance policies. These are long term commitments for at least 18-21 years - It's a very huge amount of money.