Dog and Housebreaking

I got a dog several months back. He's a cute little SOB (that cracks me up!) named Splott. Well, he's been a pretty good mutt--a cross between a beagle and a pug...they call it a puggle. Anyway, the kids love him to death (sometimes literally) and he's good to have around when I am alone, but....he can't totally get the hang of where to drop his waste products. I am getting a couple used kid gates, and going to make some modifications to the kitchen. Pads don't work 100% of the time (he misses), a crate doesnt work (he rolls in it), so this is my next deal. Wish me luck. *sigh*