Let the adults in your home know if you find matches or lighters around the house and tell them if anyone in the household is playing with fire. Remind parents to use special lighters that little children can't operate. Give smokers ashtrays. And make sure ashes are cool before dumping them into wastebaskets. Check under the cushions.
Fires can start from smoldering cigarette butts dropped behind furniture cushions.
If someone has been smoking in your home, ask an adult to help you look for hot butts or matches. Give space heaters space. Sparky wants you to measure. Practice kitchen safety. If pots are on the stove, make sure their handles are turned inward so nobody can bump them and young children can't grab them.