sitting. but not sitting.

My 11 week old wants to sit so bad. She has no interest in being in her back anymore, hates her tummy and when I recline her in her boppy she does some serious crunches trying to sit up, but she's not quite there yet... so I'm reluctant to use the jumperoo and I've heard good and bad things about the bumbo. Any gear suggestions? We get stuck home a lot because of the weather and I feel like she's bored with what we it's mostly geared towards holding a laying infant (rock n play, rocking bassinet) and she's over all that