Our Shop Sale! Mammoth Cubes – Blue £9.99 Original price was: £9.99.£7.99Current price is: £7.99. Sale! Mammoth Cubes – Green £9.99 Original price was: £9.99.£7.99Current price is: £7.99. Sale! Mammoth Cubes – Slate Grey £9.99 Original price was: £9.99.£7.99Current price is: £7.99.