(Seriously) How can I get my cats to jump?

I’m getting a bunny. I need to keep the bunny relegated to the front part of the house— she is free roam. I thought a baby gate would be prefect because the bunny can’t jump it (she is small), but the cats can and that would still allow them access to their our bed.

Well, my cats stare at it like it’s a solid brick wall. I tried tempting them with treats and play, but they just stand there, staring. WTF? I put a little chest by the gate to encourage them to look over. That did not work. They jump on higher things all the time. I eventually let them in the back last night because I felt so bad.

Any suggestions?