Give a Letter, Get A Letter.
Share Sandboxx with family and friends to earn letter credits
How do I earn letter credits?
Share Your Link
Invite your friends and family to join Sandboxx with your unique link.
They Sign Up & Send
Your referral must be a new Sandboxx member and send a letter.
You Both Earn Credits
Once your referral sends a letter, you both earn a letter credit ($4 value).