A great addition to the block play family. Smooth hardwood frames with acrylic windows; choose from shimmering water, sand or crystal bead interiors. Sized to standard unit block measurements. Eight blocks per package: 4 rectangle and 4 half moon shapes. Features plexi inner with colored liquid. • Solid wood frames with inset acrylic windows and water that sparkles • Set includes 4 rectangles and 4 half moon shapes • Strong hardwood frames • Translucent windows with colorful water • Standard unit block measurements • Material: Hardwood frames with primary colored, transparent acrylic windows and colored water • Educational Focus: Hand-eye coordination, visual perception, color exploration or light table activities • Suggested Age: 2+