I need some help finding ballet music with a water theme. It is for students aged 3-4, 5-6 and 7-8. Any help would be appreciated!!

Have you looked at any of the old Hollywood musicals, there where many with a water theme. If you want classical ballet then there's Ondine with the most recent choreography being by Sir Fred but it goes back to the 1830's with Fanny Cerrito being the first Ondine.

Just Around the River Bend from Pocahontas, Candle on the Water from Pete's Dragon (both Disney movies, although I used the last one for lyrical, but could work for ballet!). You could also do "My Favorite Things" bc of the "raindrops on roses" part!

I don't remember which dance it is in the Disney movie Fantasia, but a lot of the songs from that have water in the movie part of it.

"Aquarium" from Carnival of the Animals is beautiful

What about "Orinoco Flow" from Enya or "Water Is Wide" from Charlotte church.

Bridge Over Troubled Water (although overused)
Songs from the Little Mermaid like Under the Sea
The Sailor's Hornpipe (might be cute for little kids)
I Love It When It Rains - Wiggles (for 3-4 year olds)
Somewhere Over the Rainbow (stretching the water theme a bit)

"Little April Showers" from Bambi
"River Lullaby" from Prince of Egypt