Traditional Infant Swings Are Large And Clunky. We Believed Swings Would Be Better If They Provided The Back And Forth Gliding Motion That Babies Love In A Compact And Modern Design. That'S Why We Created The 4Moms® Rockaroo Infant Seat. By Flipping The Swing On Its Head And Moving The Pivot Point Under The Seat, The Rockaroo Provides A Large Range Of Motion In A Beautiful Design That Is Just 1/3 The Size Of Traditional Swings. •Rhythmic, Front-To-Back Motion •Compact Footprint •Five Range Of Motion Settings •Powered By Ac Adapter (No Batteries Required) •Toy Mobile With Interactive, Reversible Toy Balls That Include A Rattle, Mirror And Crinkle Ball •Tool-Less Assembly "