How do your little ones climb up on the couch?

Our daughter Clara is six YrS old and has dwarfism. Because of this she is 1’5” tall and 18 pound. at our house, the furniture is regular sized, but for Clara it is like oversized furniture. We would like some thing for her to be able to get up onto the couch. Right now she has to really struggle just to climb up. And when she finally does get up on the couch she doesn’t really fit because it’s way too big. Is there something that could get her up sitting high enough to be level with us and also fit a little more securely? Kind of like a booster seat that is the right size for her (have not found one yet) except One that is a little more couch and comfortable like. And preferably all of this she can get up into her self.