The Mark Twain STEM Labs: Alternative Energy Workbook for grades 5–8+ provides teachers, parents, and students with the resou...
WARNING: CHOKING HAZARD - Small parts. Not for children under 3 yrs.
WARNING: CHOKING HAZARD - Toy contains a marble. Not for children under 3 yrs.
Swallowed magnets can stick together across intestines causing serious infections and death. Seek immediate medical attention if magnet(s) are swallowed or inhaled.