Witch's House

Firstly make your way to the gate entrance of Taverly, just passed it you will see a little boy stand by the hedge, talk to him and he will ask you if you can get his ball back for him. Make your way around the hedge to come to the do of the house, you'll find it is locked. The key is under the first pot to your left. Go in the door and go upstairs and look around for the diary. Read it.

Now go back downstairs and then into the basement, whilst wearing your leather gloves go through the gate and search the cupboard for the magnet. Then go back upstairs and into the little room with the door that leads to garden in and drop your cheese. Suddenly a mouse will come out, attach the magnet to the mouse and it will unlock the door (caution the mouse goes away in about 20 seconds and you lose your cheese if you fail to attach the magnet in time).

Now you are in the garden you will see the witch patrolling the garden, the trick is not to let her see you! If she does she will teleport you outside of the house, and you will have to go in again. Now make you way all the way round until you reach the fountain. Search around the sides of the fountain (may take several attempts but it is there) and you will find the key to the shed.
Note: You must have read the whole dairy to get find the key.

Make you way to the shed and use the key on it. Try to take the ball and a shape shifter or "Witches Experiment" will appear and turn into 4 different monsters, each one harder than the other, it's original form, a spider, a bear and a wolf. Once you beat the Shape Shifter collect the ball and give it to the boy.

Note: When you have the ball, you may still not be seen by the witch. If she sees you, you'll be teleported out, and you will lose the key to the shed, and the ball.