Provide advice on how to accomplish the following goal. Give ONLY the advice, no other words or explanation.
For example:

Answer: <advice, as short as possible; a single sentence!>.

Goal: How do you scare little kids with a model coffin?
Drip red paint down the sides so it looks like someone is bleeding out.
Pretend it's a toy box, then suddenly say "It's a coffin! Boo!"