It turns out Dracula has a special ink he uses to write letters. Use the ink to write a note, blow on it, and the writing disappears. Spray it with a restorative fluid and it comes back.
Comes with complete instructions and explanation of the science behind the fun.
Demo Pack includes: 1 oz thymolphthalein, 1 oz sodium hydroxide, 1 paint brush, 1 pipette
Study Group Pack includes: 4 1-oz thymolphthalein, 4 1-oz sodium hydroxide, 4 paint brushes, 4 pipettes
Classroom Pack includes: 10 1-oz thymolphthalein, 10 1-oz sodium hydroxide, 10 paint brushes, 10 pipettes
School Pack includes: 32 oz thymolphthalein, 32 oz sodium hydroxide, 30 paint brushes, 30 pipettes