I had 5 rats one time. They were great. I loved them. My mom doesn't want rats though. =(
Rats make wonderful pets, but I don't think my mom wants to have to deal with changing their bedding and whatnot. idk. Plus you have to have more than one (same with guinea pigs too) and a really spacious cage for them. I have a huge cage for my rats. they loved it.
I was looking up crested geckos and they seem really neat. I always have feeder insects (for my tarantulas) so she could use the CGD and feeder insects too. They seem like they'd be the perfect pet for her.
I will discuss it with her after she's up from her nap. lol