How is this for an 8 year old? Reading here, it sounds a little expensive. The one thing Skylanders does right is the content and every character can be used.
Well, it honestly depends on the child. This game is perfect for my children, 12 and 7, who both love the creativity that something like Minecraft offers. They build worlds together on LAN all the time, and my son has been building a "game" in Minecraft for a few months with his little sister helping him out. So if they are more creativity-driven, then it will probably be great. Let's be honest, the Toy Box is where the longevity of the game is.
Now, it does have a very guided experience in each of the playsets, and while I understand that some people are upset that you can't use all the things in any playset, I totally get why it is the way it is from a fictional and developmental standpoint. Lightning McQueen piloting a ship in a sea battle? Nope. The playsets are meant to utilize some unique mechanics, and having them be totally homogeneous and able to work with every character would make the playsets very boring. Regardless of this, the playsets as they stand, do offer a value proposition that is better than some full priced games, and definitely better than almost any other kids-oriented game.
I stand by what I said about the product when it was first announced. The Toy Box is the method in which I can mix all of my favorite Disney things together in order to create crazy scenarios in which people that shouldn't be together are. The kind of thing I would have done as a kid, creating games or plots or stories in which this characters from random things are kit-bashed together by my own imagination.