Harry Potter Accio Al Fresco Hogwarts Picnic Blanket They can bring a bit of magic with them the next time they go for an afternoon in the park when they have the Harry Potter Accio Al Fresco Hogwarts Picnic Blanket (£25). Image Source: merchoid.com Harry Potter Accio Al Fresco Hogwarts Picnic Blanket £25 from merchoid.com Buy Now