Best riddles with simple answers

What is blue, green, yellow, purple, brown, black, and grey?

The front of me is the source of a song Or to kiss with a fervor of love lifelong. My back is a plant fit for a queen, Crafted by needle, chemical, or machine.

What do you get if you cross cat with an elephant?

I don’t have eyes, ears, nose and tongue, but I can see, smell, hear and taste everything. What am I?

What do you get when you cross a fly, a car, and a dog?

I'm very, very big. I like to eat peanuts and hay. I have four legs and two big ears. My long nose is called a trunk. I am an...

What kinds of stones are never found in the ocean?

I live in the ocean. I like to eat crabs. I can change colors. My eight legs are called tentacles. I am an...

I'm in you, But not in him, I go up, But not down, I'm in the colosseum, But not a tower, I'm in a puzzle, But not a riddle.

I sometimes come in a can but I'm not food. I sometimes come in a bottle but I'm not a beverage. I come in different colors but I'm not a rainbow. I'm sometimes used with canvas but I'm not a tent. I'm used with a brush but I'm not toothpaste. What Am I?