How do you get ron weasleys sticky trainers on Lego Harry Potter Years 5 7?

To get Ron Weasley's sticky trainers in LEGO Harry Potter Years 5-7, you need to play through the story until you reach the "The Muggle-Born Registration Commission" level. Once there, look for a collectible called the "Weasley’s Sticky Trainers" in the area. You can find them by using the various spells and abilities available to you, such as using Hermione's charm to interact with objects or Ron's abilities to access hidden areas. Collect the trainers to add them to your character's inventory.