SmartMax Mega Ball Run STEM Magnetic Discovery Building and Ball Run Set Featuring Safe, Extra-Strong, Oversized Building PiecesBuild the ultimate ball run with this large SmartMax magnetic construction set. Includes an amazing 71 pieces! With endless options you can make all kinds of crazy machines and let the balls roll. Mega Ball Run contains special parts including tubes and X-shaped bars with 4 magnetic ends.STEM LEARNING FUN: SmartMax Mega Ball Run features colorful oversize bars, metal balls and tubes for a super fun introduction to dynamic STEM concepts for young kids. Set up your structures…and watch the balls roll!ENGINEERING AND CREATIVITY: Designed for ages 3+, kids will be enthralled by the tactile process of clicking the bars and balls together. Kids ages 5+ can create largers balls runs for a dynamic STEM experience. SmartMax magents can carry up to 60x their own weight…making extraordinary structures possible!SET INCLUDES: 71 colorful pieces with strong bars, metal balls, tubes, connectors and a slide.ENDLESS PLAY: All SmartMax sets are compatible with each other. Kids can start building…and keep building.QUALITY AND SAFETY: Award-winning SmartMax Magnetic Discovery sets are build with high quality materials, including sonically welded bars.Suggested age suitability 3-6 years.EU Warning: Not suitable for children under the age of 3 years due to small parts which could cause a choking hazard.