[Complete Disappearing Ink Pen Set]Heclia magic pen set includes 40 disappearing ink refills, 4 durable pen shells, and 4 ergonomic grips. Perfect companion for grooved writing practice books, providing hours of educational fun without paper waste. Empower your enduring creativity and writing [Smart Magic Pen Technology]Our grooved writing pen features special disappearing ink that vanishes within 15-30 minutes after writing. Enables unlimited practice on reusable magic copybooks while promoting -friendly learning habits ages 3-8. The vanishing magic adds an extra layer of fascination [Comfortable Writing Experience]Each magic pen comes with soft silicone grip correctors that maintain proper writing posture. The ergonomic design reduces hand fatigue and improves handwriting skills during extended practice sessions. Pair it with reusable handwriting workbooks for better results [Premium Quality Materials]Crafted from high-grade plastic (not materials), our disappearing ink pen set measures 5.31*0.2*0.2 inches per pen. The pen barrel is made of raw materials which is more wear-resistant and durable. Durable construction ensures long-lasting performance in classrooms or home learning environments [Educational Gift Package]This comprehensive disappearing ink pen kit includes 40 refills, 4 pen shells, and 4 grips. Perfect birthday or gift that makes handwriting practice exciting and mess-free! Suitable to share with classmates or friends. If you are a teacher, you can also use them as novelty gifts for Christmas, and other holidaysPlain