There should be bananas on the right side of the island where everyone sells the fruit. If not, then there is a tree on the left of the fountain just north of where you start(Bianco Hills entrance). Use first person view to look up and you should see a banana growing on that tree. As far as the shines on the building, if your talking about after you clean the bells, you'll need the rocket pump. To jump higher with the rocket pump, charge up the pump and then press jump, or spin jump prior to the rocket going off.