With a Keep it to Yourself challenge, the idea is to convey the message on the outside without actually saying it with a sentiment. If you'd like to include a sentiment, you can put it on the inside of the card.
The card should be all about Friendship.
Here's what Kim created:
Such an adorable image from Some Odd Girl, dontcha think?
By the way, there's been some buzzing over in the chat box about the fact that we are less than 20 followers away from having 1000 followers! And you know I can't let that go by without a celebration...