Hey Rob,
I don't know if you had mentioned this yet but, I have found an emoji keyboard.
To find it go to:
Settings --> General --> Keyboard --> Internaltional Keyboards --> Add New Keyboard
Then scroll down to Emoji and tap on it.
Then the next time you open a keyboard if you tap on the internation symbol next to the microphone it will toggle to the emoji keyboard.
Regards,
Craig 📱