The 3 hotels listed by Iraqi are all a good bet. Or the Hyatt Regency in Deira - small ice rink there if the kids are into that. Plus reasonable pool. The old Sheraton or the Radisson Blu on the Creek are only a short taxi from the airport and altho' the OP isn't intending to do the tourist thing the dhows on the Creek are worth seeing and a water taxi over to the Dubai Museum might fill in an hour or two.
If you want to go further afield, the Metro is quick, clean and cheap BUT the station is only in Terminal 1 (no Metro connection to Terminal 3 which is EK,or T2 which is on the other side of the airport). And no metro service at all on Friday mornings.