We used a play pen at my mums. But if I'm gonna be about 15 mins, I still pop him in his bouncer and he comes into the bathroom with me. I just give him a book or something. It's been ok so far.

Now tho, just for quick loo runs.. in the place we're in, we've got like a family room out the back, which we have completely babyproofed, and we've put up a safety gate.. so he's actually got a big room all to himself! It's great. The kitchen sink actually overlooks it... I couldn't ask for a better setup I reckon!