i heard this joke on radio and i laughed at least..
Son: MAMA!! *crying*
Mum: why are u crying?
Son: my classmate keep laughing at my big head..
Mum: o my poor son, ur head are not big at all wat, it looks so nice in fact... ok stop crying and help me buy 5kg of rice k?
Son: ok, but mum where is ur shopping bag?
Mum: wat shopping bag? use ur hat la!