Most of these can be nabbed right away, but for one you'll need to pop back later once you have a certain power-up. Like all levels in Mario 64, there are 7 stars to grab here - six mission stars and one for gathering a whole bunch of coins.
Home of the bombs sounds like a rough place for a nice, easy, starter tutorial level, but it's more friendly than it seems. Super Mario 64 kicks things off with a now truly iconic level: Bob-omb Battlefield.