Gather up ingredients including levitating someone to the bottom right corner.

When you're ready, use the strength potion to pull the chain.

Now go into wardrobe, change into your earmuffs and get the shrieking guy.

Use him to break the glass.

Step on both buttons and lava comes up.

This can be very challenging! Be patient :) Move the three platforms onto the central pillars. Run around the edges to get the coin. When you're ready, get the brick.

For us this was 31/200.

Lego Harry Potter Walkthrough