You're pretty much sorted for life when it comes to buying them Christmas and birthday presents. Has anyone ever went wrong by buying their loved one a chocolate frog? Nope! Harry Potter merchandise is practically endless and there are probably lots that they haven't even seen before. From t shirts to magically designed jewellery, you're never going to get it wrong. If you're also stuck for birthday plans, invite their friends around for a Harry Potter marathon and stock up on their favourite snacks. Everyone will see you as the Neville Longbottom of the group, the warrior and a true hero.