Dry diapers, wet underwear

Nigel has been toilet trained before he turned 2. The only time he needs his diaper now is when he sleeps. Even then, I try to bring him to the toilet to pee before he naps & before I sleep at night so his diaper doesn't get so full it leaks. But for the past few days, he's been screaming himself awake when he needs to pee so I've to bring him to the toilet & so his diaper is totally dry by the time he wakes up! This is good cos then we'll save alot on buying diapers for him! (tho he only uses 2 a day, PetPet for nap & Pampers for night)

On the other hand, Shannon can't seem to grasp the idea of peeing. Whenever I put her on the potty, she thinks it's some game & can't sit for more than 15secs. If she does somehow manage to sit for longer, she'll be standing up, going to the bookshelf to grab a book or toy before returning to sit, taking the potty like a chair to sit on, if you know what I mean. She can be on the potty for 5-10mins without even a drop of pee in sight but the minute I take her off, she starts to pee all over! Arrgggghhhhh!!!!!