This Plus-Plus tube features 100 colorful pieces in a reusable, travel-friendly container inspired by Nordic design. Each tube includes step-by-step instructions and all parts needed to build a mermaid with a pearl green tail or to spark original creations through open-ended play. Ideal for children and parents seeking screen-free, hands-on fun, this Plus-Plus mermaid building set supports fine motor skills and imaginative thinking. Made without endocrine-disrupting substances, the premium-quality pieces snap together easily and store neatly for on-the-go adventures.