I know it's mad to be excited about a potty but DS never wanted to sit on his but I found this today:
www.argos.co.uk/m/static/Search/searchTerms/KETER+TOILET.htm
He has gone straight from needing nappies to wanting to pee on the loo as often as he possibly can!! (He's 20 months). I can't believe how enthusiastic he is and needs no encouragement.
Our DD had a big solid potty but this really seems 100x better . So I hope the positive effects last as it's a breakthrough for us and our 6 year old queues up to use it too