What is grey, has a trunk and jumps every 2 minutes?
An elephant with hiccups.

What is grey, has big ears and gets fatter and fatter?
A swellyphant.

What is grey, has big ears and goes 'ding-ding'?
A bellyphant.

What is grey, has big ears and is nice with icecream?
A jellyphant.

What is grey, has big ears and is very high?
A smellyphant.

What is grey, has big ears, and writes for 10 miles without stopping?
A ball-point elephant.

What is grey, has four legs and a trunk?
A mouse going on holiday.

What is grey, huge and mutters?
A mumbo-jumbo.

What is grey, Italian, and sings?
Tusker-nini.

What is grey, red, and goes round and round very fast?
An elephant in a food-mixer.