The items needed to finish Sensei's Scavenger Hunt are:
The first item is in the Ski Lodge, click the fireplace.
The second item is in the Book Room, click the candle.
The third item is in the Pet Shop. Click on the black puffle in the cage to make him turn red and catch fire. Then click on him again to get a single burning hair from him.
The fourth item is inside the Mine. Click on the lamp near the cave entrance.
The fifth item is in the Pizza shop. Click on the bottle of hot sauce on top of the brick pizza oven.
The sixth item is at the Cove. Click on the stick in the campfire.
The seventh item is up at the beacon on top of the lighthouse. Click on the jetpack near where you play the Jet Pack Adventure game.
The eighth item is at the Dojo, outside in the courtyard. Click on the lamp on the left side of the main entrance.