If you buy a refurbished laptop you can also bet on the battery being knackered from overuse. Replacements cost £35 or so. Junior might very will notice this.
The only real reason to buy refurbished laptops is for the Microsoft Office software which is often included in the price.
For internet...
For comparison, Acer's Aspire Switch 10E comes with twice as much storage in the detachable screen that you can use as a Windows tablet, along with an additional 500GB hard drive in the keyboard dock for expandability...