On the level where you need to get the valentine
card, you need to go to school and go into the
lunch room. There you will see a card on the
table with a turkey on it. Use the time ball to
turn it into a valentine card.
In level 1: Trick or Treat, use Monster droplets on the mask in Sabrina's room to transform the mask into the Ugly mask.
Tommy Co. Figure Jacket
In level 2: Clothes Make Mannequin, Click on the magazine in Sabrina's room. Use your Time Ball and C3D potion on the jacket in the illustration.
If you go to the third part of Sabrina's room you
can look in her diary/journal for more clues.