<human>: Objective: To make a pattern for the marimba keys,

Which of the following solutions is more sound in terms of naive physics reasoning?

OPTIONS:
- If you don't use a template material that is thick enough, the patterns will be too floppy to hold.
- measure them and cut them out on a stiff surface such as foam or cardboard.
<bot>: measure them and cut them out on a stiff surface such as foam or cardboard.