The Boppy Noggin Nest Head Support (full review here) is another really popular product and works really well in bouncy seats and swings. (babyflathead.org)
«My friend got me the best gift ever: a clear vinyl shower curtain, some bath accessories (shower gel, soap, a sponge, etc.), and a battery - operated vibrating bouncy seat for the baby. (babycenter.com)
Choose baby items, such as bouncy seats and swings that can be folded for storage to take up less space when they're not being used. (howtoadult.com)