Android Question Sending an edited photo via email

I'm working on an app where my grandkids can edit photos and then send Grammy and I their "Artwork". Adding things like stars, or smile faces - to personalize them.

I know, I used crayons too.

But once they are done, I want them to be able to email their work.

So it would email an attachment, leaving the recipient and subject lines empty.

Anyone know where I can start?