Less than 2 years old
Level I: Children can sit and switch positions, and they can also sit on the floor and play with their hands. Children can crawl on their hands and knees, pull objects to stand up and walk a few steps on furniture. Children between the ages of 18 months and 2 years can walk independently without any assistive devices.
Level II: The child can sit on the floor but needs to use his hands to support the balance of the body. Children can crawl against the ground or crawl with their hands and knees. They may be pulling objects up and taking a few steps with furniture.
Level III: The child needs to maintain a sitting position with support in the lower back, and can also turn over and crawl with his abdomen against the ground.
Level IV: The child can control the head, but the trunk needs to be supported while sitting on the floor. They can turn from a prone position to a supine position, or from a supine position to a prone position.
Grade V: Physiological impairment limits a child's ability to control autonomous movements. Children cannot maintain a gravity-resistant position of the head and trunk when lying prone and sitting. You can only turn over with the help of adults.
2-4 years old
Level I: Children can sit on the floor and play with their hands. They can complete the posture change between sitting and standing on the floor without the help of an adult, and the child chooses to move the walking seat preferred without the help of any step aid.
Level II: Children can sit on the floor, but may not be able to control their balance when holding objects with both hands. They can switch seats without the help of an adult. You can pull the object to stand in a stable place. You can alternately crawl with your hands and knees, and you can hold the furniture and move slowly. Their preferred way of moving is walking with a walker.
Level III: Children can maintain a sitting position (between the hips and knees with flexion and internal rotation) in a "W" posture and may need to maintain other sitting positions with the help of an adult. Crawling on the abdomen or on the knees with hands and knees is their preferred way of moving themselves (but often do not alternate between the legs in harmony). They can pull objects up and stand in a stable place and do short distances. If there are walkers or adults to help them navigate directions and turns, they may be able to walk short distances in the room.
Level IV: Children at this level can sit in a chair, but they need to rely on a special chair to control the torso, thus freeing their hands. They can sit in or leave the chair with the help of an adult or when there is a steady flat surface for them to push or pull by hand. At best, they can walk a short distance with a walker under the supervision of adults, but it is difficult for them to turn around and maintain their balance on uneven planes. These children cannot walk alone in public. Be able to move on your own with the help of a powered wheelchair.
Grade V: Physiological impairment limits these children's ability to control free movements and maintain gravity-resistant postures in the body and head. All aspects of their motor function are limited. Special devices and assistive technologies do not fully compensate for the functional limitations of a child's ability to sit and stand. These fifth-grade children have no way to act independently and need to be transported. Some children can use a further modified electric wheelchair for activities.
4-6 years old
Level I: Your child can sit, leave, or sit in a chair without the help of both hands. They can get up from the floor or from a chair without any object support, they can walk around indoors and outdoors, they can also climb stairs, and the ability to run and jump is being developed.
Level II: Children can sit firmly in a chair while playing with things with their hands, and can stand up from the floor or chair, but often need a stable flat surface for them to pull or push with both hands. It is possible to walk indoors without the help of any walker, and it is also possible to walk a short distance on the horizontal ground outdoors. They can climb stairs with their handrails, but they can't run and jump.
Level III: The child can sit in a normal chair, but needs the support of the pelvic or torso to free his hands. Children need a steady flat surface for them to pull or push with both hands when sitting on and out of the chair. They are able to walk on horizontal ground with the help of walkers and up stairs with the help of adults. However, when traveling long distances or on uneven ground outdoors, you cannot walk alone.
Level IV: The child can sit in a chair, but a special chair is needed to control the balance of the torso, so as to be as free as possible. When they sit on or leave the chair, they must have the help of an adult, or with both hands pulling or pushing a stable plane. Children can at best walk a short distance with the help of a walker and the supervision of an adult, but they have a hard time turning around and maintaining balance on uneven ground. They cannot walk on their own in public and can move on their own if they use an electric wheelchair.
Grade V: Physiological impairment limits children's control of autonomous movements and their ability to maintain gravity-resistant postures in their heads and torso. These children have limited motor function in all aspects. Even the use of special instruments and assistive technologies does not fully compensate for the limitations they are subjected to in terms of sitting and standing functions. Children in the fifth stage are completely unable to move independently, and some children may be able to move autonomously through the use of further modified electric wheelchairs.
6-12 years old
Level I: Children can walk indoors and outdoors without any restrictions and can climb stairs. They can show gross athletic abilities such as running and jumping, but their speed, balance, and coordination have decreased.
Level II: Children can walk indoors and outdoors, and can grab a handrail to climb stairs, but walking on uneven ground or slopes will be restricted, and walking in crowds or narrow places will also be restricted. At most, they barely reach the level of running and jumping.
Level III: Children can use a walker on the horizontal ground indoors and outdoors using a walker and may be able to climb stairs with a handrail. Depending on the function of the upper limbs, when traveling longer distances or on uneven terrain outdoors, some children can push their own wheelchairs, and some need to be transported.
Level IV: These children may continue to maintain the motor abilities they acquired before the age of 6, and some may be more dependent on wheelchairs at home, at school, and in public. These children can move on their own using electric wheelchairs.
Grade V: Physiological impairment limits children's control of autonomous movements and their ability to maintain gravity-resistant postures on their heads and trunks. These children have limited motor function in all aspects. Even with the use of special instruments and assistive technologies, they do not fully compensate for the limitations on the function of sitting and standing. Children in the fifth stage are completely unable to move independently, and some children may be able to move autonomously through the use of further modified electric wheelchairs.
Differences between levels
Differences between Level I and Level II: Compared to children at Level I, children at Level II are limited in their ability to perform the following movements: movement switching, walking outdoors and in the community; the use of assistive devices when starting to walk; the quality of activity and the ability to complete coarse motor skills, such as running and jumping.
The difference between level II and level III: The difference is mainly manifested in the degree of achieving certain motor functions, grade III children need auxiliary motor equipment to walk, and often need to use orthosis, while level II children do not need to use auxiliary sports equipment after the age of 4.
Differences between Level III and Level IV: Even if they are allowed to use assistive technology extensively, there is a difference in sitting and mobility. Grade III children can sit alone, move independently on the ground, and can walk with motor equipment, while ivy children can sit (usually need support), but their ability to move independently is very limited, and they are more likely to be transported or use a powered wheelchair.
Difference between grade IV and grade V: Children with grade V lack the ability to move independently and cannot control even the most basic gravity-resistant posture. Only if the child learns how to use the electric wheelchair will they be able to move themselves.