Instructions
Harry's Dorm
Build the clock in Harry's Dorm and switch to Hermione and target it. Press "X" to use the Time Turner.
Open the suitcase to the left of the clock to obtain the Dean Thomas character token.
Open the large chest and jump inside to gain a gold brick.
Target the lock and hit "B" to cast the Reducto spell and gain the Seamus Finnegan character token.
Quidditch Gate
Build the clock right outside the Quidditch Gate and switch to Hermione and target it. Press "X" to use the Time Turner.
Press "X" to cast a spell on the lock on the chest.
Target the student in peril inside the case and Press "B" to cast Leviosa and free him.
Hagrid's Garden
Build the clock in Hagrid's Garden and switch to Hermione and target it. Press "X" to use the Time Turner.
Target the pumpkin on top of the student in peril and press "B" to cast Leviosa and save him.
Go to the mound of dirt on the right of the garden and switch to Fang to dig up the Petunia Dursley character token.
Clock Tower
Build the clock in the top of the Clock Tower and switch to Hermione and target it. Press "X" to use the Time Turner and receive the Milkman character token.
Target the cabinet in the back of the room and press "X" to cast a spell.
Switch to Hermione and target the rune cabinet. Press "B" to cast the Reducto spell and receive the Madam Rosmerta character token.
Owlery
Build the clock in the Owlrey and switch to Hermione and target it. Press "X" to use the Time Turner.
Target the three packages on the room's right side and press "B" to cast the Leviosa spell. You will find a gold brick.
Target the student in peril in the birdbath and press "X" to cast a spell to save him.
Target the cupboard and press "B" to cast the Reducto spell and open it. Build the LEGO pieces into the cleaner and clean up the owl droppings to obtain the Barty Crouch Senior character token.
Target the painting on the left wall of the Owlery towel and press "X" to cast a spell. Ride the lift up to the top room, then cast a spell on the plant. Build the resultant LEGO pieces into the gramaphone to get the "Hermione (Hogwarts)" character token.