A fantastic collection of realistic pretend bricks, blocks and rocks Weather-proof and lightweight, these unique foam builders stack easily Endless creative building project possibilities 20 Cinder Blocks, 25 Rock Wall, 25 Brick, and 25 Ice Bricks 3 years and up 3 years & up. Build to new heights with this fantastic collection of realistic pretend bricks, blocks, and rocks! This set of lightweight foam builders stack easily for endless creative building projects. Included: 20-piece Cinder Block Set, 25-piece Rock Wall Builder Set, 25-piece Brick Builder Set, and 25-piece Ice Brick Builder Set. Activity cards included.