Solar Powered Rockers

I love these SOFT Rockers created by Sheila Kennedy, Professor of the Practice of Architecture at MIT and a small team of Design, Engineering and Architecture students.
They are both form and function.

"The SOFT Rocker leverages its environment in a dynamic manner by using the human power of balance to create an interactive 1.5 axis 35 watt solar tracking system. Soft power electronics designed for this project charge the 12 ampere-hour battery and store solar energy harvested during the day."