What kind of tiles can't you stick on walls?
Reptiles.

What powerful reptile is found in the Sydney opera house?
The Lizard of Oz.

What's the definition of a nervous breakdown?
A chameleon on a tartan rug.

Why did the lizard go on a diet?
It weighed too much for its scales.

What is a chameleon's motto?
A change is as good as a rest.