I see you've already installed a baseboad and am curious what you think of it. Brand, etc... I am also in the market and will be starting a thread about it.
With that said and since others may look here for advice, I figured I'd post my experience at our previous house since it was similar. We needed to supplement heat in a 2nd floor room, also a nursery, but instead of trying to run electrical and install a baseboard heat, we found a tower space heater that is thermostatically controlled and even has a remote control. It worked excellent to keep the room at a comfortable temp and didn't cost us a fortune electrically either. I forget the brand, but probably found it at Lowes or H.D.. We had wood floors and felt it was very safe, not hot to the touch, if it got even slightly bumped it would shut off, it would oscillate(SP?), and could be turned on/off/auto. Probably cost about $50 to buy and we still use it today to supplement a baseboard in 2nd floor bath until we can figure out a more permanent solution.