Desktop should be lowered when playing with toys to avoid bad shrugging posture.
Keep kids’ arms at 90 ° ~ 120 ° is the appropriate angle for using fingers and wrist on writing as well as good gesture of holding pens.
Keep the book stand up at 30° to reduce eye fatigue and lead to myopia lesions.
More health risks are revealed in relation to sitting too much during the day, so to develop a good sit-stand habit for children from school age.