panelpolls is a great site that is geared towards families. even children ages 2-17 can join the site!
you can redeem in increments of $10 and can choose amazon or a mailed check.
if you live in NY or LA you also may be invited to high paying in-person projects as well! i just signed on about 3 months ago and haven't been invited to any special projects or focus groups yet--just basic surveys but i have heard they offer lots of good stuff so be sure to check them out!
from the site:
Panelpolls: The cool opinion site
they do like to keep the panel small so you may not get in right away, depending on their current needs. here is the link to register: http://community.panelpolls.com/registration