Steh auf (English translation)

Hi edka,

This is a good translation, I have a few minor changes to recommend. If you have any questions, feel free to let me know.

Colorful kites are flying in the sky -> Colorful kites fly in the sky
Boats are swimming on the lake -> Boats swim on the lake
-Changed the verb tenses here. Technically you could use those tenses, but we'd be more likely to say it this way given the context.

But you are just laying -> But you're just lying
liegen = lie
legen = lay
This mistake is in a few places. My trick for remembering this is that "liegen" has "lie" in it and the beginning of "legen" sounds like "lay."

on the wet bed - on the bed, in the wetness
Assuming this isn't some kind of idiom, you could use "wetness" even though it's not a noun there in German.

Don't just lay there, what a shame -> Don't just lie there, it would be a shame

Circus is in the town today -> The circus is in town today
"Circus" needs a definite article in English, but "town" doesn't.

But you are just laying -> But you just keep lying there

Why do I have to wait all the time -> Why do I always have to wait?
Why do I have to cry all the time -> Why do I always have to cry?

On the arms, on the legs -> On your arms, on your legs
German usually just uses a definite article in circumstances like this, but in English we always need a possessive pronoun to say whose body parts they are. Otherwise it sounds as if they've been severed and are not attached to anyone.