Hey, I have been away for a lot of time now and on returning I found out that one comment has been posted for me creating a walking kid. So, now let's get aware that the technique that I am going to show you people in this blog is very basic and very very simple. So let's start.

1: First open your model, go to the front viewport, and smooth it by pressing the 3 key.

2: Then make the model transparent by pressing the 4 key and select the joint tool.

3: After selecting the joint tool, make a skeletal structure of the spine like the one shown.

4: Then align the joints in the shape of the spine of your model like shown below.

5: Now create all the joints by the same process, but just create one side of the body, and after that create IK's from the starting of the legs to the ending of the ankles. Then select the joints and select mirror joints which should be in the YZ axis such as shown.

6: Now select the skeleton and then the body and go to skin, bind skin, and then smooth bind.

7: Now go to the add weights tool and then select the joints one by one and apply weights according to that as shown.

Now all you have to do is move the body and the IKs to animate the walk cycle and this can be done by using the following walk cycle reference that as below and you can create a walk cycle or walking kid.