mjkurslasky   about 3 hours later

Your friends will need to create KaBOOM! accounts to join the committee. On your Play Day page there's a blue link that says "Sign in to join this Play Day." Once they sign-up, they should click the blue "Become a Member" button.

HAYC3   about 4 hours later

Thank you - we figured it out!! We already have a committee - they just weren't officially signed up