Build five dinosaurs - or mix and match for some crazy prehistoric creations - with Smart Max My First Dinosaurs! SmartMax Magnetic Discovery is a stem-focused brand that enables young children to discover magnetism in a safe and fun way! The SmartMax My First line is designed for ages 1-5 and features playful themes and easy constructions. My First Dinosaurs features strong bars and soft, colorful pieces for hours of enriching fun.