in house fencing...

where do you guys who have the in house pens but that grided fencin from? i really want to create a play are for my two like the pictures i have seen on this forum

They are called NIC cubes or C and C grids. You can get them from loads of places on the internet, just type it into google or ebay

If you search for 'mesh storage cubes' on eBay or amazon you might find them. Someone recently saw some in B&Q so that's another option. They are difficult to get hold of though. If you look at the link in my signature, indoor housing, there may be some more info or you might find an alternative.