Take me out and scratch my head, I am now black but once was red. What am I?

I am writing my own now.

Here's a riddle I wrote myself. I hope you like it.

At dizzying speeds I talk to you
A reflection of sound with lasers too
I'll tell you a story, and sing you a song
Stop and listen, or sing along.
WHAT AM I?

Riddle 6

What is black when you buy it, red when you use it, and grey when you throw it away?

Riddle #5

I don't know if anyone reads the riddles I post on this blog, but I will continue to post riddles anyway. Here goes:

A dozen royals gathered round
Entertained by 2 who clowned
Each king had their servents 10
Though none of them were also men
The lowest servant sometimes might
Defeat the king in a fair fight
A weapon stout, a priceless jewel,
The beat of life, a gardeners tool.

What is this poem talking about?

The Fourth Riddle

Here's one that I wrote myself. It's not very good, but here goes:

I am a box with not much to show
Only liquid and trees within me are known
You turn my lid and open me up
Explore new worlds with me on up
To places where not many can go
Like mountains high and valleys low
Oceans deep and rivers long
Hey, I might even contain a song
So open me up and dive right in
Then close me up and start again

What am I?

The Third Riddle

Even though no one tried to figure out the previous one, I will post a third one anyway:

A dozen royals gathered round
Entertained by 2 who clowned
Each king had their servants ten
Though none of them were also men
The lowest servent sometimes might
Defeat the king in a fair fight
A weapon stout, a priceless jewel,
The beat of life, a farmer's tool