Well my kids have been potty trained for a while. Boys all most always take longer. My daughter was ready a 16months took 1 day. Just took her in to her potty every 15 mintues and making her drink more than normal so she had to go. Then made HUGE deal about it and gave her M&M's (faviorite candy) Also we chose pretty big girl undies togeather .Made her feel like it was her choice and she was in charge of her own potty habits.
My son took a while he was 3 before pee training happened . He still has a bowl problem (medical condaiton Next treatment is a colstomy, trying a couple more things first)