Brief introduction: Trisomy 21, also known as congenital ignorance, is a disease caused by chromosomal abnormalities. Simulate the facial features and physical signs of infants with special dementia: wide eye distance, squint eyes, low nose base, flat nose, thick tongue, black head, short fingers, large distance between the first and second toes, sandals feet, short stature, etc. .
Can carry out infant basic nursing operation training.