I actually just started looking into potty training, and I think he's showing a lot of readiness signs. (godiaperfree.com)
I created this program for children who are showing reading readiness signs at a younger age, approximately ages 3 - 5. (learningwithmom.org)
Once you do, make sure all the potty training readiness signs are there and remember to approach potty training in a supporting role rather than as director. (verywellfamily.com)