Skylanders game is perfect for a 10 year old.
There are 3 versions out now.
1)Spyros Adventure
2)Skylanders Giant
3)Skylanders Swap Force
The spyros adventure is on it way out and being retired shortly, from what I have heard from different retailers, Game Stop, Toys R Us and Wal-Mart associates. Now this is what I was told and should be taken that way.
Swap force is the newest version out.
You have to purchase the starter pack which includes, game, portal of power and 2 or 3 figures. Other figures can be purchased there are singles and 3 packs to add to the game, as you advance.
I would get the Swap force as it is the newest out. Toys R Us does have some deal on it right now. So I would check it out.