Description: 【Adjustable Weight for Versatile Training】: Sand or Water Filled Dumbbells allow for adjustable weight by adding water or sand, making it suitable for children to customize their workout intensity as they grow stronger 【Promotes Muscle Development】: Engaging in weightlifting exercises with the Fitness Sport Toy helps enhance children's arm, shoulder, and back muscles, boosting their overall strength and endurance. It's an ideal tool for early physical training to foster healthy exercise habits 【Quallity Materials】: Made from ABS material, this Fitness Workout Equipment features a smooth surface with no sharp edges, ensuring your child's safe during playing 【Engaging Design】: The adorable design attracts children's attention, making exercise more enjoyable and encouraging them to stay active 【Easy Handling】: With a length of 25.3cm/9.96inch, Kids Hand Dumbbells are perfectly sized for young children to handle comfortably while exercising or playing pretend games at home or in the kindergarten setting Size Chart: length 25.3cm/9.96inch Package Includes: 2 Water Filled Dumbbells Note: 1.This is not infant toy, please take away from children to avoid eating. 2.Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.