The changing table needs water nearby, a supply of wipes and extra diapers. Cabinets need locks. Electrical plugs need shields. Broken toys and furniture need to be repaired. Paint needs to be lead-free.
Furniture needs to be sturdy enough for a child to pull up without toppling it.
Doors need child-proof knobs. Outside playground gates need sturdy fasteners too high for children to reach and sufficient padding beneath climbing toys and swings. In other words, a nursery needs the same regard for child safety as any careful home. This is essential. Everyone agrees, however, that attendants need to be people who love babies, not just somebody to provide a presence.