The Wired Wizards has had success with
IndieGogo crowdfunding campaigns.
The key with a crowdfunding campaign is to strategize when you start it. We started one last year without properly planning how to promote it, and we didn't reach our goal. A few months later we started another one, had a more reasonable goal, and told everyone about it, and we met our goal.
I also just posted a thread in the Fundraising section with a document I wrote from 3 years of FRC marketing experience to help a new all girls FTC team I'm mentoring -
you can see it here. It might be helpful to your team.