No you see you just need to buy specially marked boxes of Cap'n Crunch that have a plastic whistle in them that plays the tones for you.

I wonder how many HN readers still get that reference (and 2600, etc.)

	▲	hunter2_ 20 minutes ago \| parent [-]
		We make use of a service already existing without paying for what could be dirt-cheap if it wasn't run by profiteering gluttons...