The article is about the best toys for babies to spend time lying on their tummies. Tummy time is an important developmental activity that helps babies strengthen their muscles, develop head and neck control, and preventflatspots on the back of their heads. It also encourages visual exploration, depth perception, and spatial awareness. The article discusses different types of toys that are suitable for different stages of婴儿的发展，并且考虑到了安全性和多功能性。The best tummy time toys for each stage of婴儿的发展如下：
- 新生儿和月龄较小的婴儿：建议使用可转换的枕头玩具，如VTech Tummy Time Discovery Pillow，具有亲子互动和音乐功能，同时易于清洁。
- 月龄较大的婴儿：可以选择具有镜子的玩具，如Sassy Tummy Time Floor Mirror，以及可以交互的玩具，如Fat Brain Toys Rock 'n Roller Piano，以促进感官发展和精细运动技能。
- 年龄较大的婴儿：可以逐渐引导他们使用高对比度图像的图书，如Black & White Little Library，或者进行更多的结构性游戏，如Melissa &Doug Flip Fish Soft Baby Toy，以增强手眼协调能力。
总的来说，选择适合婴儿发展阶段的玩具对促进其健康成长至关重要。