Science & Exploration Sets features: It is a DIY spring scale toy, which can exercise your children practical ability, train your children observation capability, thinking and analytical skills. Bright colors will appeal to children and let them learn with fun and enjoyment. It is made of good quality material, which is durable and lasting for use. Features-Color:Random color-Material: ABS-Size: About15.00X2.80X0.30cm/5.89X1.10X0.12inch Made of good quality material, not easy to damage, safe and durable, useful and interesting Manual assembly model, which will help your child's developmental skills and learning minds You can send it to your families and friends as a gift, they will be happy for this creative and practical product Also, an experiment and teaching model, can make your kid study science, fun learning It is ideal for classroom and field applications for measuring weight and exploring the physical principles of force and mass.