Ok, ok, so maybe "solve" overstates it a bit. But certainly, after playing with this science kit, your kid will be that much closer to being the next Secretary of the Interior.
Although it's really a toy, this kit comes with some pretty nifty gadgets. Use the simple wind vane to track the direction of the wind; watch the rain gauge to record your own seasonal rainfall measurement; check the anemometer to discover... whatever it is anemometers measure. (We did look it up: the anemometer measures wind speed.) In addition to a thermometer, the set comes with a terrarium you can plant in order to observe the greenhouse effect on a small scale.
Available from Incredible Science for $9.99.