Playful Lumi spring rocker is a joyful surprise for the player. When the rocker is moved, it will start flashing green light inside the seat. When the rocking stops, the seat part is white. The product does not need wiring for electricity, because the kinetic energy produced by swinging is collected to the generator inside the seat. Smaller players can sit on the seat facing the backrest, and bigger ones just like a swinging chair.