Children will love stacking these transparent ice blocks to make towers, castles and igloos. Set of 20 Pieces. Endless opportunities for creative building and imaginative play These ice blocks are super shiny and lightweight Each block measures 8"L x 4"W x 2-3/4"H Blocks are a sparkling shade of turquoise A great addition to your building blocks area Made of PETG (Polyethylene terephthalate) plastic Ages 3 and up.