The more of this there is, the less you see. What is it?

What jumps when it walks and sits when it stands?

Can you find the missing piece of the Porsche?

I hide my treasure in the ground, my tail is big and fluffy. If you spot me in a tree, please don’t call me scruffy. What am I?

What has many keys but can’t open a single lock?

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

Can you spot what's wrong with the following sentence?

PETER WAS ANGRY AT
HIMSELF BECAUSE HE
ACCIDENTALLY LEFT THE
THE KEYS TO HIS CAR
AT HIS FRIEND'S HOUSE.

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

You Throw The Outside, Cook The Inside
Eat The Outside, Throw The Inside.

What Is It?

A man started to town with a fox, a goose, and a sack of corn. He came to a stream which he had to cross in a tiny boat. He could only take one across at a time. He could not leave the fox alone with the goose or the goose alone with the corn. How did he get them all safely over the stream?