What is grey and has big ears and 2 wheels?
An elephant on a motorbike.

What is grey and lights up?
An electric elephant.

What is grey and powdery?
Instant elephant.

What is grey and white and red all over?
A bashful elephant.

What is grey on the inside and yellow on the outside?
An elephant disguised as a banana.

What is grey on the inside, and green on the outside?
An elephant disguised as a cucumber.

What is grey on the inside, and white on the outside?
An elephant sandwich.

What is grey then brown, grey then brown, grey then brown?
An elephant on a barbecue spit.

What is grey, has 2 wings and gives money to baby elephants?
The tusk fairy.

What is grey, has 4 doors and goes beep, beep, beeeeeeeeep?
A 4-door elephant with a jammed horn.