Children started a bedroom fire at a property on Brunswick Place in Hanley at 8.35am on Saturday morning.
"Children can be curious about fire but often do not fully understand the potential serious consequences of playing with fire."
Station Manager, Ian Read
Their parents were still asleep when the three children, aged seven, four and two, got up and found a gas lighter in the house.
They then took it into their bedroom and set one of the beds alight.
Staffordshire Fire and Rescue Service had been out to the property earlier in the year to carry out a free Home Fire Risk Check where new smoke alarms were fitted.
Station Manager, Ian Read said: "Luckily the smoke alarms activated and woke up the children’s parents before the fire took hold. Everyone was safely out of the house on arrival of firefighters from Hanley and the fire hadn’t managed to take hold and was out on arrival.
"There has been some considerable smoke damage to the property, particularly the affected bedroom so all the children were taken to hospital for precautionary checks but did not require any treatment.
"We would urge parents to ensure all types of lighters and matches are kept out of sight and reach of children, as children can be curious about fire but often do not fully understand the potential serious consequences of playing with fire.
"Had it not been for the smoke alarms alerting the parents we could have been dealing with a very different incident, so this also highlights the importance of having smoke alarms fitted and ensuring they work by testing them weekly."