Big, brainy science for the littlest listeners.On Saint Patrick's Day, Baby learns why plants like clovers are green: photosynthesis! Accurate enough to satisfy an expert, yet simple enough for Baby, this clever board book explores the science of photosynthesis, leaf anatomy, and traditions surrounding St. Patrick's Day. Beautiful, visually stimulating illustrations complement age-appropriate language to encourage Baby's sense of wonder. Parents and caregivers may learn a thing or two as well.