This Plus-Plus Metal Suitcase contains everything needed to get started with the Plus-Plus building system, including a sturdy tin storage box and a Guide Book with step-by-step instructions for flat mosaics and 3D creations like animals, people and buildings. This set includes 500 Basic color mix pieces, 100 Neon color mix pieces and two small baseplates to create bright, detailed designs. This compact metal suitcase keeps pieces organized for travel or storage and supports guided builds as well as open-ended play that builds fine motor skills, spatial reasoning and creativity. This set is made from materials free from endocrine-disrupting substances, giving parents added reassurance while children explore creative play.