Children with achondroplasia typically exhibit: - Short stature with an average adult height of about 4 feet. - Disproportionately short arms and legs, particularly the upper arms and thighs. - A large head with a prominent forehead. - Midface hypoplasia (underdevelopment of the midfacial region). - Trident hand, where the fingers are of equal length and separation between the middle and ring fingers is apparent.