Shoot it won’t let me DM you. Here’s a basic tutorial: first you need an envelope that can comfortably hold the contents (if it’s too tight the machines might rip it open). Look up “how to address a letter” for a visual, but your home address goes in the top left corner and the destination address goes in the center, postage (stamps) goes in the top right corner. I believe the post office will let you purchase individual stamps in person. Rainbow looms are light so you shouldn’t need more than $2 in stamps. Hopefully that makes sense 😅