Check the listing for details. Discovery Fizzing Mars Chemical Reaction Kit STEM MIB 2019. Condition: New. Listed at 12.00 USD. Explore the wonders of chemistry with the Discovery Fizzing Mars Chemical Reaction Kit! This STEM kit is perfect for boys and girls who love to experiment and discover the world around them. With its 2019 release, this kit is brand new and ready to be enjoyed by young scientists everywhere. Featuring a fun and exciting Mars theme, this kit allows kids to conduct cool chemical reactions without any batteries or electricity. Made in China, this kit includes everything needed to perform experiments, learn about chemistry, and have fun while doing it! Unlock your child's curiosity with the Discovery Fizzing Mars Chemical Reaction Kit. Box is a little creased but unopened. Tape was pealed back for me to confirm all of the parts are in there and the fizz ball was not cracked/chipped/broken Open to offers!