Another Potty Training and Diaper Question

[Guest guest]

Hi. I am trying to find a better fitting diaper for my 3 yr old,

. has mild autism and verbal apraxia plus sensory issues,

too. He is a tall little boy and weighs 43 pounds. The largest

Huggies that we've been using are just not doing the trick anymore,

especially at night. I have been looking into what is next as far as

diapers - any ideas? He's not even close to being able to start potty

training (although I wish he were). I am going to buy a potty for him -

any suggestions on that? I debate whether or not to buy him a little

potty or just try to go with a seat for the regular toilet. Any ideas

or suggestions are greatly appreciated. Thanks.