If you see the light, play as mario. Go into first person mode and look in the light. Fly
unil u reach the ? Switch( it is a huge grey platform you can't miss it)

Press x inthe main hall on the sun rug as mario and hit the ? Swich

Stand in the sun in the main hall and look were the light is coming from

Get a certain number of stars (i'm not sure how many) then go to the main hall of the
castle. You should see the sun pattern lit up by a shaft of sunlight from above. Make sure
you are mario then go into close-up view and look up. You will be transported to the sky
with wings on your cap. There is a stone platform in the middle with a big red lump on it.
Stand on/pound the lump and the ? Blocks will become solid.

Easy as a mustareshtre hero in the alstle the cirle rug click x until you see in first
person mode any look up at the light fly to the platform jump on the ? Swicth and boom!
All ? Blocks become solid