La operaciòn de rescate

En un día hermosa dos chicos dieron un paseo. Fueron a través de un bosque. Vieron un arbol, que estuve al lado de un lago. En el bosque estuve un gato negro. De repente el gato se cayó del arbol en el agua. Un de los chicos se espantó, pero el otro rió. El primer chico trajo un red de pescar y sacó el gato del agua.

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Hi Meli! Great job you did here miss. Just a few corrections to make here and there, but overall it's a great exercise. Let's have a look at those couple of things. Follow me!

La operación de rescate (cool title)

1. Un bonito día dos chicos dieron un paseo. Okay, maybe you're guessing...why don't I say "En un día hermosa"? Well, first of all, it should be HERMOSO rather than HERMOSA, since the word "día" (day) is masculine (el día). But anyway, I've used "un bonito día", because to tell the truth, in Spanish (from Spain at least) we don't use the adjective "hermoso/a" that much, really. We rather say bonito/a, or just "un buen día" (just a nice day). I guess we find the adjective "hermoso/a" a little bit cloying maybe...you know what I mean?

2. Fueron a través de un bosque. Good! No mistakes here. You could also say "Caminaron a través de un bosque", or "Anduvieron a través de un bosque". Both mean "They went for a walk through the bushes". Something like that.

3. Vieron un árbol al lado de un lago. There's no need to say "They saw a tree which was next to a river", 'cause it kinda breaks the rythm of the sentence, you know. In Spanish, as in English (I know a little bit of German, but not enough to make a statement on this), you can say "They saw a tree next to a river". No need for "que estaba" there. Oh, and why "estaba" and not "estuve"? Well, let's save that for any other time, please. It's a little bit picky. Well, it's way too picky, to tell the truth.

4. En el bosque había un gato negro. Why "había"? We use the verb "haber" when counting things. It's pretty similar to when in English we say "there is, there are, there was, there were", you know. Here you wanted to tell us "there was a cat in the bushes", so you gotta use the verb "haber" here. "Hay" if it's present tense, and "había" if it's past tense, okay?

5. De repente el gato se cayó del árbol AL agua. If the cat would have been in the water, you would have said as you did, but if the cat -or whatever- fell into the water, then you gotta use this "al". IE: I fell into the hole - Yo me caí al agujero. And if I was already into that hole, I would have said "Yo estaba en el agujero".  Got it?

6. Uno de los chicos se espantó, pero el otro rió. Veeery good. It would have sounded even more natural if you've said "Uno de los chicos se asustó, pero el otro se rió", but anyway, yours was more than fine. Good!

7. El primer chico trajo UNA red de pescar y sacó el gato del agua. Good job again! Just that minor mistake. Since "red" (net) is feminine, you gotta say "una" instead of "un", okay?

And that's all! Hope this helps Meli. Keep it up! You're doing great.