We recently bought the girls a Sun Jar each for their bedrooms and are so impressed with them! They are standard glass jars which are frosted and have a solar panel built into the top. You leave it outside or on the windowsill throughout the day and at night it uses the stored solar energy to light up. I love the idea of a little bit of the sun being 'caught' in a jar to use at night, and even better it's a free way to light the girls rooms softly. The jars have a blue or orange colour mode, I love the orange though as it looks so warm and inviting.