Give a Letter, Get a Letter.
Share Sandboxx with others to get free letters.
How do I earn free letters?
01. Share your link
Invite your friends and family to join Sandboxx with your unique link.
02. Sign Up & Send
Your referral must be a new Sandboxx member and send a letter.
03. You both get free letters.
Once your referral sends a letter, you both earn a letter credit ($4 value).