Where is the ice lolly in lego harry potter restricted section?

In LEGO Harry Potter: Years 1-4, the ice lolly can be found in the Restricted Section of the library. To obtain it, you need to use a character with the ability to cast a spell that reveals hidden objects, such as Hermione with her spellbook. Look for the ice lolly near a bookshelf; it may be highlighted when you approach it. Collect it to complete the challenge in that area.