材质：聚碳酸酯。尺寸：长约13cm。内含四种液体观察管。防漏设计，让幼儿能仔细观察，感知液体密度与分离的关系，探究浮沉及地吸引力等科学现象。
Our leakproof tubes let kids see science concepts in action! Just flip them over to watch gravity in motion, observe how liquids of different densities separate, view water currents, learn about buoyancy and more! 4 plastic 5" tubes.
Targets standards in these areas:
• Cause & effect relationships
• Characteristics of liquids
• Changes in materials
• Buoyancy
