Because I can't remember what led to it being imposed in the first place? 
He's 7. On a weekend away there was clearly something that happened (I honestly cannot remember) and he decided his punishment was to be banned from consoles (we have a Wii and he has a DS) for 5 days. Only weekend days, as that's the only time they're allowed anyway. Today is day 3.
He has since given up his DS for lent, so it's just the Wii, and he suggested playing MarioKart together.
Am I giving the wrong message by letting him? Am I a truly crap parent for not remembering? Tbh had he not reminded me of his ban I'd probably not have thought twice, so maybe I should allow him as a reward for his honesty 