Safe space heater/alternative?

[playfelt]

I have a small space heater that I often turn on in the basement when I get up and then when we go down an hour or so later I turn it off and put it up. The chill is off the floor and the kids running around keeps them warm. By the time the chill is coming back it is time to go upstairs anyways. My gang also wear runningshoes in the house or at least are supposed to so feet are protected if we are downstairs. I have carpet and thick underpad to help with the heat.