If you really want to hide them, you could take a rotozip and cut a short, depth line in the sheetrock, bury the cable and then mud over the top, sand and then paint. They will be hidden, and away from the 2 year old. Just remeber the line you ran them.
You could also pull off the basboard, put them under or behind the base and reattach the baseboard. Just be carful not to break, or you will have to get new. Doing this will have to recalk and paint perhaps.
Or, you could use wiremold and attach to wall, and put cable in it. Keeps it out of the way, but it is tacky.