My first is in tea but not in leaf
My second is in teapot and also in teeth
My third is in caddy but not in cosy
My fourth is in cup but not in rosy
My fifth is in herbal and also in health
My sixth is in peppermint and always in wealth
My last is in drink, so what can I be?
I’m there in a classroom, do you listen to me?

As fast as an eagle, as slow as a slug. As tall as a tree, as small as a bug. Sometimes in front, sometimes behind. Never on top, and always aligned. What is it?

Gleam, glitter, glow,

They're moving very slow,

Sometimes on a smooth surface,

Often searching they\'re way down,

Between hunderds of obstacles,

They can be seen in every town,

Always moving and searching their way,

Again and again, everyday,

They merge and seperate with their species all the time,

And they can also be found, in this little rhyme.