Baby Sign Language Playgroup: Welcoming babies 3 months and up! Learn the basics of Baby Sign Language, from the alphabet to the main 25 "power" signs. Come learn baby sign language at our drop in classes as we share a new theme of words each week through practicum, songs, games, and stories. $5.00 per class or $25.00 packages with 1 free class! Official HHH Members get 2 free classes. Walnut Creek Library, Children's Center Patio at 4:15 pm, perfect for babies 3 months & older.