Ada Twist, Scientist Light and Reveal Pen with Invisible Ink, Lights Up and Plays The The Hypothesis Song, Accessory for Scientist Dress-Up Set, Kids Toys for Ages 3 Up by Just Play

This Ada Twist, Scientist pen features lights, phrases, music and includes a notepad. Press the pen's button to hear Ada sing "The Hypothesis Song"!, Write a message on the notepad with the invisible ink pen and shine the light to reveal the hidden message., Looks just like the one Ada uses on Netflix’s preschool show and makes a great accessory for the Ada Twist, Scientist Dress-Up Set., Bring home the the rest of the Ada Twist, Scientist toys and let your child explore the fun of friendship, scientific discovery, and teamwork., Requires 3 x AG13 batteries (included)., Ages 3+