Recommended age 12+ Read the manual and all warnings before use. 1. Always wear eye protection. 2. Please take out the excess water beads after ending the game, in case it gets stuck next time. 3. Please soak the water bead in water for at least 3-4 hours prior to use, making it expand at least to 7-8mm in size. Water beads that are too small may jam the gun! 4. Before first use, please charge for at least 2 hours.