Harli, from Stoke Newington, London, has been running his online marble company for TWO YEARS, selling everything from jars of glass marbles through to £599 limited edition Duke of York solitaire tables.
The junior Alan Sugar spends all his time outside school buying his stock, processing orders from his website, and dealing with his suppliers.
His company is now turning over thousands of pounds and demand for Harli's products has reached such a fever pitch that he has taken on 'staff'!
Harli told the Daily Mirror: "I like having my own company. I like being the boss."
Do you have a mini-mogul in your family?