My son stared walking at 8 mos and never looked back. Enjoy running after him! Just try to make sure he has teachers who also enjoy him - if not, switch teachers( I did, twice). I was counseled to "always stay close enough to him that if he finds a rock pile, I can physically stop him from throwing the rocks". I may be worn out, but he's not, starting junior year at MIT and enjoying a paying internship this summer as an architectural engineer( whatever that is). There is light at the end of the tunnel. My son never cared much to take the time to share with his teachers what he learned from them, it took too much time away from things he wanted to do. So his grades were always rocky, but achievement test scores stellar. Pick your battles, respect his spirit, stand up for him! Enjoy!