【Fun Group Play with Magnetic Building Blocks】An exciting choice for group games with magnetic building blocks — suitable for cousins, daycare, preschool or kindergarten. Kids can collaborate on creative projects, boosting teamwork, interaction and hands-on fun. 【Create Houses, Castles & More with STEM Magnetic Blocks】Featuring strong magnets, our STEM magnetic blocks allow kids to build stable and intricate structures such as houses, castles, towers and beyond. The sturdy connection keeps every project solid during play or display. 【Vibrant & Safety Magnetic Light Up Blocks】Each block is carefully polished with smooth edges for safety play. Colored with plant-based dye technology for vibrant, long-lasting colors. Includes magnetic light up blocks to make every creation shine. 【STEM Learning & Screen-Free Entertainment】Suitable for classroom demonstrations and screen-free play, this STEM magnetic building block set helps develop spatial awareness, hand-eye coordination, logical thinking and problem-solving skills while keeping children engaged. 【138-Piece Set with Magnetic Light Up Blocks】This 138-piece set combines assorted colors with durable magnets and 3 special magnetic light up blocks, making it a versatile choice for birthdays, holidays, or educational play at home and school. 1