A Great Gift for 8-12 Years Old - Create unique STEM Toys for 8-12 years old & teens. Complete All in One Kit - Contains 5 set module parts can be build different kinds cars mini-type generatormini bubble machine. Manufacturered by Poraxy. Easy to assemble - Includes Mini Screwdriver and Detailed instructions make it much easier and convenient to assemble the models.Includes everything needed for easy snap-fit/screw-together assembly. Requires two AA batteries.(Not included) 100% Satisfaction Guarantee - Contact us if you are not satisfied with it for any reason. And we promise all the issue will be solved within 24 hours. Specially STEM education LABS Kit - The 5 erector set are designed to enhance children's Science Technology Engineering and Math skills.