When you come out of the Abbafor Spell Challenge, go to the grounds when Ron wants you to go to the Quiditch match. Help the people who request help. Some of them will require a Broomstick. So, go to the Quiditch match and once it is finished, collect your broom from Oliver Wood. Go back to the grounds and help the people. The last Boy will want you to get some Mandarake roots. You will locate them over near Hagrid's Hut. Give the roots to the boy and he will give you the *KEY* to the convisgated items room. Go to the room, open the door and there you will find a giant bean-bag and several Wizard Cards in a few chests.
Added by: supa_sleek10 , ID#1566