I bought my 5-year old a tablet and after several weeks he was already complaining that his tablet won't open and the LCD is already cracked. Good thing I gave him one of these generic tablets which cost less than $100. Now he is using an HP netbook and it's been with him for a year now.
For these same reasons, I was discouraged by my friend to buy inexpensive China phones. You would not know where to bring your phone in case there will be problems on its parts. The after-sales services is one consideration that we have to make when we buy gadgets like smartphones.