vortex + polymer water beads?

[markdem]

my nephews are now old enough to play Nerf. I'd like to play shooting games with them in the woods behind my house but i dont want plastic nerf darts littering the area. i need a biodegradable alternative. low impact (JT splatmaster) paintball guns are still too powerful for them. i was thinking of making a handful of very low power (under 100fps) vortex BB machine guns. does anybody know if i can use those polymer water beads in a vortex bbmg? or will the beads disintegrate in the vortex before they even make it to the barrel?

[jackssmirkingrevenge]

Never actually handled them but in this fellow's video test you can see them bouncing off after being shot at a wall, I would say they would probably survive being put in a low pressure vortex gun.