A 2-year old is certainly not too old to be in diapers. I learned that when it comes to potty training, it is very important to take the cue from the child on whether or not she/he is ready to use the potty at that time. Starting too early will likely result in tantrums, great numbers of accidents, disappointment, and frustration of child on repeat failures. I started potty training my older son when he was only 14 month old, after my grandma had sworn up and down that I was potty trained by age 12 months. After a few months of unsuccessful attempts to have him tell me on time when he felt the urge to use the bathroom, we took a break and tried again a few months later. Since we started too early, my son had become not only discouraged but also came to fear toilets at some point, since he had slipped through his former potty seat and almost fallen into the toilet at one time. This was a major set-back and he was well over two years old when he was finally completely potty trained. I also found he had more accidents in daycare, since he was too scared to use the daycare center potties on his own, since they resembled an actually adult toilet. My younger son did not start training to use the potty until after his second birthday. We bought funny pull-up pants and set out a blue potty right next to the real toilet in our bathroom. After watching his dad and older brother use the toilet multiple times each day, he was inspired to try on his own. I think he was ready to learn, since he was a lot older than my first son who was only a few months past his first birthday. The level of maturity helped my youngest learn to use the potty within only a few months. Soon we were able to convert to a clip-on potty seat for the toilet and invest in a few packs of brand-new toddler sized underwear with Elmo, Thomas the Tank Engine, and Go Diego Go on them. He also did the sticker chart, which was another motivator for him since he loved placing stickers on everything around him. Therefore, when to start potty training your child totally depends on the individual child. Some cues to look for before starting are looking for clean diapers after each nap and signs that your child displays to signal the need to use the bathroom. Is he hiding in the corner and makes a funny (red-flushed) face while going number two? Then that may be a great time to call out a quick “wait, hold on”, grab his hand, and lead him to the bathroom to sit on the potty. Once your child wakes up from naps or in the morning with a dry diaper, he/she has demonstrated they can hold their urine or bowel movement for extended periods of time. If they can control their toileting habits somewhat already, they may well be ready to try using the potty.