How do I post a bridge schematics using a letter box using sims free play?

I don't recall you needing to do that but I did that so long ago... A letterbox is the box outside your house in which you receive mail, and in which you PUT mail. Just have a sim go outside and use the letterbox and select the proper option.

You have to get bridge schematics on a computer how

You get a bridge schematics by downloading it on the computer

You go to the mail box, Tap it, And hit the schematics thing

You have to get your sim to go up to the mail box and then press the mail box and the option for the schematics thing will be there

Walk near the mailbox then tap it then you can see the choices

Go to your other Sims house and press on the letter box and it says it,
if it doesnt work go to your other other Sims letter box and it should work