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3g) POTION INGRIEDIANTS
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From the start head the Hagrids hut by going down to the main entrance hall and
then into the Hogwarts school grounds, like before when you first met BuckBeak.

In the area by the river and near the trees you will see a light, head down 
towards this, underneath the trees you will see the first ingridiant that you
want, Chizpurfles. Change you character to Ron and use target one of them and
use Lumos to drag them towards the Venomous Tentaculos (The Plants) When they 
are infront of the Tentaculos they will be eaten and you will get the 
ingrediant, do this 3 times.

Now, change to Hermione and head back up the hut and get on BuckBeak, fly 
towards a light on the left of the river and catch the Billywig's here, catch
them by flying straight at them, it isn't to hard. Once you have got 3 fly
around the castle until you see yet another light, set BuckBeak down and freeze
the flames on the tree using Glacius. The seeds will drop when the tree is 
frozen.

You will now have all the ingrediants, so head to the Potions classroom in the
dungeon.

After the cutscene in the potions room, go to the Charms classroom on the 2nd
floor, a short cutscene will introduce you to the next task of collecting a 
spell book.