Toysmith Hidden Tweets (Assorted Colors) Add sound to egg hunts with these chirping eggs. Hide several of these eggs with prizes for a fun time with friends and family. With over 16 hours of battery life, these eggs can be hidden inside or outside well in advance. Flip the switch for chirps that repeat every 20 seconds. These eggs are recommended for ages 3 and up. Challenge your children's imaginations and keep them active with Toysmith. Committed to providing the most imaginative toys along with the highest safety standards, Toysmith has toys appropriate for all age groups. Toysmith offers toys for any kind of play: active play, science and discovery, arts and crafts, impulse and novelty toys, and nostalgic retro classics.