Made using eco-friendly fibers, Polar Cuddle Cubâ?TMs soft shivers create a nurturing tactile sensations that warms the heart and calms the senses. The two gentle vibrating options -- Heartbeat vibration, which recreates mother's loving embrace and Shivering vibration, to make children feel safe and secure -- help generate the ideal environment for any activity. Also includes adoption certificate, and Polar Cuddle Cub storybook that teaches children about endangered animals. Eco-friendly anti-bacterial fabric. Vibration device with 2 gentle rhythmic options Time and hug activation options Memory foam hands and feet Storybook and adoption certificate 2 AA batteries included