Features:Package includes 20000pcs water ball beads, made of environmental-frendly super absorbent polymer material.These water gels will burst when impacted, can be used for toy gun bullets.Tiny size and lightweight, you can take them anywhere you want.Simply soak these gel ball beads in water for 2-4 hour before use, they will expand to 7-8mm.Suitable for automatic gel toys, plant decorations, kids sensory toys, vase filler etc.Specification:Material: super absorbent polymerColor: transparentexpansion size: approx. 7- 8mm in diameter when fully soakedAttention:Keep them out of the reach of children, especially children under 4 years old.Do not pour these gel ball beads down the drain or watercourses.Allow small quantity/size deviations due to human measurement.