I've made it to the under sea cavern is there and easy way to avoid the blocks and get the star?
Deb

I can remember two or three areas like that, so you are going to have to be more specific. The galaxy name would be helpful. You can also take a look at our Video Index or our guides.

the name of the galaxy is Beach Bowl galaxy it's the one where Mario has to crask into the wall with a shell and go to the path where the blocks are

That one can be tough, and there really are only a couple of minor shortcuts. You'll need good timing and patience for the most part. Eventually you'll get it if you keep trying. Here's a video showing some strategies:


You actually have to do this level twice. The second time, the enemies are a lot faster though. Have fun!