HONGCI New Magic Color Changing Lab Putty Can Jump, Temperature Change Mud Heat Sensitive Hypercolor from (Purple Turns Blue)

If you do not play for a long time, it will become hard, you only need to add a little water and then rub, you can restore the original look. Parents can lead the children to play together to guide the child's thinking. Suitable for all ages(Age 6+), is conducive to children's intellectual development, . The rmochromic putty heat will change the color, Safe, environmentally friendly, clean, Soft no sticky hand, Good elasticity, like the ball bounce,