How can you paint a room to look much much bigger and brighter?

my grandma always said to paint the ceiling the same color and it makes your room look taller. my son has a very small narrow room. so i paints stripes horizontally on 2 walls which i think make it look longer when you walk in... and always use bright colors never use dark colors which will make it look small

I would paint the ceiling white and the walls a very light color

DO NOT PAINT IT ALL ONE color~ the ceiling should be lighter to make it look taller! Our house HAD it like that and it felt like a box. Lighter shade on ceiling and then a darker shade on walls....Much brighter!