when i take a photo on my i phone how come it does not show up on my other apple devices

Iphone 6 Plus with ios 8.0.2 64gb

ipad air with ios 8.0.2

ipod touch

When i take a picture with my Iphone it does not show up on my other two apple deivices. I have photo stream turned on for all devices and have checked settings and looked at the manual and i am still having problems. Can anyone help me with this probably simple solution.