Cheap Entertainment?

Or is it?  My geeky math brain actually thinks about figuring out the energy loss and the amount we pay for the three and a half minutes I allow Svea to play in the fridge (timed, of course).  Not because I'm worried about it, but because I'm obsessed with real life math problems!  She loves re-arranging the plastic bottles on the bottom two shelves and sitting inside.  You can't tell from the photos, but this is an outfit from Grandma and Grandpa Dornfeld!