In the third Game, you can buy them at Fred and George's store or find them in chests. Usually in secret passageways or Hard-to-Get-to places. ~DarkestNyght
You find all the ingredients to the potion that is in a gold cauldron by Harry's bed.
go in the leaky cauldron and redo the charms levels then complete it go back into the room and find them. Enjoy
ii found it in harry potter
In Harry Potter and the Chamber of Secrets, Hermione Granger makes a sleeping potion and places it inside a cake which puts the two boys to sleep. Harry and Ron levitated the cakes so they'd find them.
When Hagrid took him out shopping for that first time.
Go to seargh and type in Harry Potter.
The names of the book in order are harry potter and the philosophers stone harry potter and the chamber of secrets harry potter and the prisoner of azkaban harry potter and the goblet of fire harry potter and the order of the phoenix harry potter and half blood prince harry potter and the deathly hallows
See related links for the best biography of Harry Potter.
You can find the answer on a website called Fanfiction. There are fic where people write about Harry Potter reading Harry Potter and The philosopher's stone and so on...
I found original Harry Potter Spells on movies.
Walkthroughs for Lego Harry Potter can be found on Youtube.