Question

how to get hard bones

Answer 1

take diet rich in calcium
include milk and eggs in your diet

Answer 2

10 Natural Ways to Build Healthy Bones

@Eat Lots of Vegetables. Vegetables are great for your bones.
@Perform Strength Training and Weight-Bearing Exercises.
@Consume Enough Protein.
@Eat High-Calcium Foods Throughout the Day.
@Get Plenty of Vitamin D and Vitamin K.
@Avoid Very Low-Calorie Diets.
@Consider Taking a Collagen Supplement.
@Maintain a Stable, Healthy Weight.