Sand

[Will2]

How many bags of argos play sand would it take to fill a 6x2x2 approx 2" deep?

 

[doresy]

3 I'd say, give or take a couple of grains

 

[smithrc]

at 2.50 a bag - spend a tenner and get 4 - you can always take unused ones back

 

[Snooks1!]

It took me a bag and a half to fill my 4x2x2 about 2-3 inches, so two bags should be fine for a six footer, maybe buy 3 just in case.