Which is a better way to say it?

Today we are telling out parents (the grandparents) that we are expecting another little one, since its october i want to take some pics with out daughter surrounded my pumpkins and put

1) "We are adding a new little pumpkin to the patch"

2) "We're adding a new little pumkin to the patch"

3) "We are adding a new little pumpkin to OUR patch"

4) "We are adding a new little pumpkin to OUR patch"

Which sounds better and looks better? I want it to be perfect.....