An inflatable solar powered light for under $25.

From last year’s Luci inflatable solar lantern, comes MPOWERD’s Luci Aura -- an inflatable solar lantern that cycles through four colors for mood lighting. You can stop the cycling and pick one glowing color, or a white light for reading or emergency use. Charging Luci Aura under full sun or incandescent light for eight hours yields up to 12 hours of colorful light. Luci Aura retails for $24.99 and is expected to make her way onto retail shelves by mid-2014. She will also be available on the company’s website in the first quarter of 2014. 

The plain white Luci solar lantern is still available for under $15. You can also order lanterns to be provided to third world countries for people who don't have access to electricity.

http://www.mpowerd.com/