Ds has started showing an interest in sitting on the loo and seems to prefer the idea to the potty which he'll sit on but rarely does anything on. He's too scared to stay on for long once he's up there though as we haven't got a small seat for him yet (we just hold him on at the moment when he asks) Is it best to get one of those permanent fixed joint adult/child seats or one he can put on himself when he wants? (he's 2.3 at the moment and I'm not actively potty training yet)