Comparisons

[Ju]

Hi everybody! I am new to this forum. I teach grade 4 learners for whom English is a second or even a third language. I came across some (to me!) unfamiliar comparisons. Can someone please help?
As naughty as ...?
As yellow as ...?
As nice as ....?
As long as ...?
As sad as ...?
As cross as ...?
As smart as ...?
As rich as ...?
Thank you!

[Beeesneees]

as yellow as the sun / as yellow as custard
as nice as pie
as rich as Croesus

These might help:
http://walkingadventure-day1.blogspot.com/2010/09/as-tired-worn-out-cliche.html
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Cheers m' dears!