Infantino Foot Rattles Baby's natural kicking motion will become a source of non-stop entertainment! A set of two colourful, rattling socks, develops cause and effect learning. This novel idea for baby play comes to you from Infantino. The Cow & Sheep gently rattle as baby moves.Recommended for use in the car and whilst shopping to both amuse baby and also to help protect little feet from the air-conditioning.