I'm surprised by most of the responses here
They are kittens, this is what they do!!!
We teach manners with the similar commands as the dogs, the variations is so that each knows who we are correcting.
Anyway... squirt bottles work great if you don't over use them.. it'll take MONTHS of repetition and then years of reinforcement!!! You gotta follow through, get up and remove them from wherever. The girls slow down a bit after getting spayed but boys are crazy for years
regardless
More toys specifically for them will help, there should be dozens of choices available for 3 kitties, foil & paper balls, stuffed socks, mice, balls, boxes with holes & tunnels, tubes, scratching posts, etc
I have one 5 month old right now, Sophie is doing the usual stuff too, but we just keep at it. Our sounds work so well we haven't even brought out the squirt bottle for her yet. It's every 2 minutes except when she's asleep.. I call it the terrible twos.
Same difference.
Our oldest cat looks at her like she's crazy and even the 3 year old does too.. they will slow down
some
Hang in there a few more months