It's not enough that you've worked hard enough to earn a vacation (and can pay for it, too). Your kids expect to have a say in the matter, too. In the Intelligence Group's newest Cassandra Report, which focuses on tweens and marketing, fully one-third of parents report their kids are "extremely influential" on household purchases big and small. Armed with technology and opinions, today's tweens also are well on their way to becoming online shoppers and want products that are customized to them. And, as you'd expect, they'd like them now, please.