i bought one that looked great from bunnings. you have to take your current toiket seat off and replace it with this other one. It is screwed down so doesn't wobble at all. It has a normal toilet seat, then a kids toilet seat that folds down, then the lid.

unfortunately the fastenings (screw bits) couldn't attach to my toilet so i couldn't use it. i wish it did though!

i have a pic on my phone so will try to put it n here.