🚀 Build, Learn, and Conquer the Seas! Engage in hands-on learning that boosts engineering skills. Smooth, safe parts for hassle-free building. Encourages focus and creativity away from screens. Build 25 unique models, including a massive cruiser! Mix and match with all major building brands. STEM learning 25 models 811 pcs The Sitodier STEM Building Set Toy features 811 pieces that allow kids aged 6 and up to construct 25 different models, including a large engineering cruiser. Designed to promote STEM learning, this set encourages creativity, problem-solving, and collaboration while providing a screen-free play experience. Compatible with major building brands, it offers endless possibilities for imaginative construction.