What about buying a toilet seat or letting her choose a potty herself for at home? Let her also choose some nice pants.
My friend works in a nursery and she says every now and then they just take the children to try if they do it great if not they try again in a bit, no pressure.
I can remember training my dd a few months ago and it was a bit stressful. Now she's pretty much cracked it, we are still not getting pooh's in the toilet but she has been suffering constipation so we'll work towards that. (so from holding pooh in for a week to poohing in pants/ nappy is good progress for us now we need to wean her off the medicine and get her doing it on her own and on the loo would be a bonus!