Anyway to make a brush with physics?

[gokumike]

Is there any way to make a brush with physics that doesn't get destroyed? I made one and it fell and everything but it got destroyed? i set one of the properties to 0 to make it not break like it said, but it still did. then when i made another it didn't fall, I am trying to make a brush that is 1 x 1 of the smallest block to simulate physics debris. I plan on making lots of them so when bombs go off near them they fly everywhere. any help would be appreciated. thanks

 

[batchetska]

turn them into func_physboxes

 

[gokumike]

turn them into func_physboxes

tried it. they don't act right for somereason. they don't fall and they get destroyed and i don't want them to, any ideas?