-"The National Geographic Cool Reaction Chemistry Kit has everything your children need to conduct five amazing experiments. They'll make messages appear and disappear, create fizzy, bubbling reactions, and more! A detailed experiment guide takes you step-by-step through each experiment and includes insight into the pH science and chemical reactions that make this kit so much fun!
-Create fizzy and color changing creations
-Hide and reveal messages
-For ages 8 and up
-4 pieces of pH paper3 cotton balls
-3 cotton balls3 experiment cups
-3 experiment cups2 measuring scoops
-2 measuring scoopsSodium bicarbonate
-Sodium bicarbonateCitric acid"
-"Weight : 1.37 kg
-Dimensions : 22 × 8 × 30 cm
-Age：More than 8 years old"