On Sunday the 18th he was presumably stalling from his nap when he said "Use the potty?", so Ryan took him in - and lo and behold - he went! Wow! I was stunned. He went again later that day, and Ryan upped the ante and told him if he went 2 more times he would get a special "Crocodile Train" he'd been wanting. Well, I guess that was the incentive Lincoln needed, because he was determined to get his "cropadile". The next morning we were off to Toys R Us to buy the coveted "Cropadile"...and many more trains to keep up his interest.
I made a special sticker chart for him, with every 3 potty times getting a train car. He has whizzed through 2 charts already (and now he has to go 5 times, and the prize is a Matchbox car...much less expensive!) and he is doing great. The other incentive he likes almost as much as the cars/trains? A hip-hip-hooray from mom and anyone else at home! It is so cute - he just beams and says "3 cheers for Lincoln!"
He is still reluctant to wear underwear all the time, but he does seem to especially like the "Wall E" and "Dash" ones he picked out. I have him wear the underwear a couple hours a day at a stretch, but haven't been brave enough for him to try them out of the house or for naps. He has used the potty at Arby's (yuck), McDonalds (eww), and church successfully, too!
I'm sure we still have a long road ahead of us, but I feel like we are making some serious progress! I may not have a kid going to school in diapers after all!