Out of Sight, Out of Mind, Out of Danger

Dangerous fire-making devices, such as matches and lighters, or devices that require fire to function, such as candles or fuel-burning lamps, should always be kept out of reach of children.

Pay special attention to frequently used devices, such as barbecue lighters and smokers' cigarette lighters.
While fire extinguishers should be kept accessible, make sure that they're kept out of reach of small children. Modern household fire extinguishers are reasonably safe, but a child tampering with an extinguisher can create a pretty big mess—and force your household to operate one extinguisher short until you have it recharged.
Cook on the back burners if possible when children are in the house. This is gives an extra precautionary space between a child's reach and danger.