M.F.
I use what's called a "Family Toilet Seat" on the toilet in my home daycare and plan on buying more when my daughter is older for every toilet in my house. It's a toilet seat that replaces your existing seat. It has a regular seat for adults and a small, kid-sized seat all hinged together with the lid. The kid-sized seat fits into the lid when not in use, but can just be pulled down when needed. I love it because it's sturdy for the kids to sit on, they can pull it down all by themselves and adults can still use the toilet without having to figure out where to put the potty seat. I have an elongated bowl also, but found my Family Seat online at Target. Didn't find them when I searched just now, but here's a few links I did find. Good luck!
http://www.activeforever.com/p-5627-family-toilet-seat.as...
http://www.totsafe.com/proddetail.asp?prod=818
http://www.sears.com/shc/s/p_10153_12605_08301327000P?vNa...