riddle

1.
I am black and white
I have four cousins in Hong Kong
Come and hug me and kiss me
I am cute and strong
2.
I look like a long chain
On a special track I run fast
I make a choo-choo sound
Mountains, rivers and towns
I happily go past
3.
I am made up of pieces in bright colours
Chidren stack me up carefully
They make cars and ship and houses with me
They they break them up and build som others