Plus-Plus Learn to Build Glow 400 PC combines open-ended construction with the quiet magic of glow-in-the-dark play. These small, intuitive pieces encourage spatial reasoning and creative problem-solving—ideal for building independently or collaboratively. The modular system grows with developing minds, offering endless design possibilities from simple structures to intricate architectural projects. Designed and made in Denmark, Plus-Plus prioritizes both safety and sustainability. The pieces are BPA- and phthalate-free, meeting rigorous standards for discerning families. Practical hygiene matters too: the entire set washes easily in the dishwasher or washing machine, simplifying cleanup without compromising durability. Quiet, screen-free play that engages concentration and spatial creativity. A heirloom-quality activity toy that rewards patient building and imaginative thinking.