Unlock fun and learning with the Smart Sounds Baby Keys. These adorable baby keys feature three colorful buttons that play cheerful songs, melodies and cute sound effects. The interactive keys feature textured rollers, rattle beads and a spinning disc that encourage fine motor skills and introduce cause and effect. The bear key teething toy stimulates your baby''s gums. Shake the keys or press the colorful buttons to hear playful sounds and phrases that promote first words, then take the keys along for on-the-go play! Intended for ages Birth+. Requires three LR44 button cell batteries. Batteries included for demo purposes only. New batteries recommended for regular use.