For Disney and Universal adults start at 10, you can upgrade a childs ticket to an adults at any guest relations window.

<blockquote id="quote" class="ffs">quote:Originally posted by jo-anne
If I buy child Disney tickets which don't expire, what happens when the children 'expire' and become adults? Are their tickets no longer valid? Will I have to pay to have them upgraded?
What is the maximum 'child' age please?
Thanks
Jo-Anne[/quote]