The little children were as happy as clams at high tide.
Yes.
Yes.
as happy as a lark, clown, lady bug, etc.
Happy as a clam/a sandboy/Larry.
Larry?
no it is not a metaphor because it is a simile.
Like a happy fox
The use of "as" in the phrase "happy as a lark" incorporates the use of a simile. In addition, lark is typically used as a symbol for hope, happiness and good fortune.
That is a simile though you do have a little rhyming and repetition with the "as" bits.
Yes, it is a simile. Keep in mind that a simile is a metaphor, but not all metaphors are similes. A simile is a metaphor that uses the words like or as for the comparison.
no a simile is when something is like something for example as snug as a bug in a rug meaning comfortable ( and a little humorous )
The simile in your sentence is "like roses".