Apparently it's a planetary nebula called PN G164.8+31.1 - rather boring name for such a wonderful thing. Anyhoo - go have a look and take your kids with you - it's interesting, educational and pretty much child-safe from what I've seen. Click on the pictures to take you to their info pages - you can zoom in and out and have a look around if you'd like :) Have fun!
Yes, there are a lot of images of blobs but believe it or not, even they need to be classified because as technology improves, it may be possible to get a closer look at them. The site is huge but interesting. The sign up form has a tick box to say you are over 5 years old (!!) so pretty much anyone can have a go. There was one young man on the newbies forum this week who 'found' this one - how exciting would that be?