There's one we learned at camp that goes like this:

Sarasponda, sarasponda, sarasponda ret set set.
Sarasponda, sarasponda sarasponda ret set set.
A doray-oh, A doray boomday-oh.
A doray boomday ret set set, ah say pa say oh.
Boom-be-da, boom-be-da, boom-be-da, boomÉ

Comments:
Split group into 2 parts. Sing through together, then one group continues singing the boom-be-da part, while the other sings through the verse. Then switch.

The tune for this round can be found here, and if you open this URL twice and time it right, you can even hear the two copies of the URL "sing" the round as a round.

There's even some sheet music here if you like to save the song in this fashion.

I believe this Dutch round is supposed to mimic the sounds of a flying shuttle loom - one where the shuttle is shot from the shuttle box at one side of the loom to the other, by jerking on a control or drive rope - as it weaves cloth. The booming imitates the sound of the beater reed being pulled back against the newly woven clith, to pack the threads in tightly without any gaps.

Dave