UFO Sighting in Salem, Oregon on July 14th 2015 – Walked to Clark Creek park in Salem with children and was talking and looked up and we saw and filmed ufo during the day

My small children and myself were walking around the park picking berries on a nice sunny warm day not many clouds in the sky, and we looked up and sighted a white round ufo stationary in the sky. It was around 5pm and I had my cannon camera with me and so I started to film it. My young toddler was crying in the stroller so I didn't film it for long because it was distracting me and I couldn't get the camera to be still in my hand but I still managed to get a great video of what we saw. A moment after turning off the camera I looked and it was gone. I told my 5 year old maybe it will come back and let us watch it after we pick some more berries and so we walked for a few minutes and looked and it was back again. It seemed to super slowly move a tiny bit if you were sitting still watching it. It was pretty amazing. It disappeared right in front of our eyes. Not long after seeing it we saw a white airplane roughly the same area and height in the sky. Comparing the size I would say the ufo was maybe half the size of the airplane. I wasn't afraid and I wanted to see it again but we continued to the playground area and I looked a few times and didn't see it again.