Your little champ is now active enough to hop or skip front and back without much difficulty. This is a sign of his improving spatial orientation, which is allowing him to have free and pain free movement at his will.
What you need to know
Your kiddo will be way too excited with his new found flexibility and chances of him overdoing the same are going to be very high. Keep an eye on his activities and make sure that he does not end up hurting himself unnecessarily. Add physical activities in his daily schedule but not at the cost of his health and well being.