Short Phrases:
* Slippery slope
* Silent storm
* Smiling sun
* Sweet sorrow
* Salty sea
Sentences:
* Sally slipped on the slippery sidewalk, scraping her knee.
* The sleek, silver snake slithered silently through the tall grass.
* Seven sleepy students slept soundly in the school library.
* The shimmering stars sparkled in the starlit sky.
* She sold seashells by the seashore.
Remember, alliteration is the repetition of the same sound at the beginning of words.