Covers many attractions, McDonald's, restaurants , bars, coffee shops etc etc. E.g. The one of the city's only museums which isn't free, the transport museum in Cheetham Hill, 2-4-1 tickets (it's really good too).
You could always buy a 60p city zone child single in a ticket machine to access these or adult for £1.20. Possibly valid with a train ticket bought from a greater manc station (but not leaving from a city centre one) as these have CTLZ on which is all-day central tram use.