Goal:
To make the doorbell trigger a guard dog bark when pressed.
Answer:
Attach a recording module to the doorbell to playback a dog barking.

Goal:
fork
Answer:
can be broken by a drill

Goal:
What can I do with my spare change to save it?
Answer:
Put the change into an old, rinsed milk jug.

Goal:
To ensure the glass is cut by dropping hot metal into a bath of oil and water.
Answer:
Use bigger pieces of metal for thicker glass.