Name this mystery tune!

[Apostrophe362]

Hi everyone,

I played a piece years ago as part of a youth symphony. I recently remembered it and I'd like to find it again, but I forgot its name.

I created an MP3 file, attached to this post. It's what I remember of the opening measures of the piece. Does anyone recognize it?

Please note, I'm working off memory here, so my transcription may not be 100% note-for-note accurate. But it's close enough an approximation to the original, hopefully at least similar enough to be recognizable!

Thanks in advance for your help!