In addition to providing them healthy snacks and lunches, sufficient sleep and time for relaxation and play, it is important to teach our kids how to properly wear a backpack. Carrying a heavy or uneven load can result in poor posture, and over time change the alignment of the spinal column. This can cause muscle strain, headaches, back and arm pain. Check out these tips! Choose the right backpack: Go for a lightweight material that has two wide, adjustable and…