"RicodJour" wrote:

-snip-
If you're really concerned about stopping the weeds, they make
fortified sand mixes for filling the cracks between pavers. It's
brushed in, sets by sprinkling with water - best thing to prevent weeds
from getting started.

I'd go with an Ortho product to kill weeds. You spray once a year &
it kills any existing weeds and prevents weed and grass seeds from
sprouting. The label says it is safe for pets and kids as soon as it
dries.

Jim