I keep seeing how children get more expensive as they get older, but as mine are not yet school age I'm worried I've not budgeted for something or am in blissful ignorance of the teen years. We pay nursery fees now, and will pay school fees going forwards. He does swimming now which I assume will get more expensive, but most after school clubs are covered by school fees, as are lunches. Uniform and books we have budgeted for as well as smaller school trips. Is it just clothes/tech/bigger school trips that become more expensive? What am I missing?