Smartivity Pot Shots Marble game - This is an Educational DIY Activity Kit designed to help children of ages 8 years and older to understand fundamental principles of S.T.E.M. subjects(Science, Technology, Engineering and Mathematics) DIY Time: 70min| Play Time: Unlimited The box contains 186 Elements. STEM Principles Your Child Will Learn Through Play: Projectile motion, Elasticity, Energy transfer, angle deflection Skills Developed: Analytical Skills, Hand-eye coordination, Cognitive Skills, Practical Skills Best S.T.E.M. Educational Gift for Young Minds