If your kids are old enough to be trusted with turning on and off the lights, but are not yet tall enough, this will bring the light switch down to their level, while still leaving it up where you can reach it. I don't remember if I was inspired by another project I saw somewhere, or if I just dreamed it up all by my lonesome. Either way it came in real handy for the last few years. I recently disassembled the ones I made since my youngest can now reach the switch on his own, so I don't have a picture of the finished project. Sorry. The drawing should still give you the idea.
Step 1: Materials & tools
light switch (thicker ones work better)
wire coat hanger (thicker/stiffer ones work better for this, too)
wooden dowel or bead ~ 1/2" diameter
hot glue gun