HI M.,
I just wanted to add my two cents to the potty training issue. First off, it is great that your son is showing interest in this area. But, that is not all he needs to be able to be trained completely. I am a mother of four children, 24 year old girl, 22 year old boy, 12 year old son and 7 a year old daughter. Since you are a SAHM, things might be a little easier for you to follow a schedule. Schedules are great if they can be the same every day.
In my experience, the potty training issue can be come a huge source of a power struggle. That is what is was with my oldest! I was young and inexperienced about it. At 17 months, she said potty to grandpa as she was standing by the bathroom door. Well, she went potty! I was so excited, but I decided to wait since I was expecting #2 in the next two months...so I waited to start with her because I didnt want to need to get up every single time she said Potty! The other issue back then was the diapers couldnt be sealed back on the baby, so every time she wanted to just sit on the pot, it ruined the diaper unles your were real careful. Well, four months later, when "I" was ready to train her, it became a power struggle. Guess what? She always won! It needs to be their idea...all the time. I can even remember making her sit on the pot when she was at daycare. She said "No, I dont need to go." Well, we left daycare and she was wet in less than 5 minutes from the time we left...she was controlling the situation. I too gave her treats/rewards each time she pottied in the toilet or even if she just sat....well, that was not a good idea either.
In my opinion, if a child much under the age of 2 1/2 is trained, it is mostly that the adults in their lives are trained! If you are willing to work extra hard, it can happen. But be ready for some set backs....versus, if you wait for a while longer, then it will be your child trained and not you.
I think that if you are going to reward them for going, it should not be connected to food at all...a little song and dance by mom, dad or daycare provider should be adequate...and their own excitement on an awesome accomplishment. Just be sure and not do what I did the first time around and get in power struggles over something that you cant control at all.
Best of luck,
T.