STEM Kit Chemical and electrochemical experiments Learn about reactions between solids, liquids and gases. Discover the colorful effects of acids and bases. Perform amazing "magic" tricks for your friends, effervescent and foamy reactions. Write messages with invisible ink. Investigate metals and salts in electrochemical experiments with a 9-volt battery (not included). Find out for yourself how chemistry goes beyond textbooks and laboratories to explain events that happen around us every day. The color experiment manual provides simple instructions for setting up and performing each experiment and then clear explanations of what happened and why. Contains instruction manual. Requires battery Recommended age: +9 years. Made of plastic. According to EN71&ASTM regulations. WARNING: Contraindicated for children under 8 years. Adult supervision of the child is recommended during play. Read the instructions before use, follow them and keep them for reference. Harmful to aquatic life with long lasting effects! May cause eye damage and irritation! Made in Germany for Thames & Kosmos, England. Manual STEM Kit Chemical and Electrochemical Experiments, Thames & Kosmos - download the file here