I'm glad I could give you a laugh. There are so many good awful nickname ideas. For added humor: Imagine Steven taking any of the slightly older gemlings to chuckie cheese or other places like that. It just ends with 'ok I saved one of them from the ballpit. I an't entering Baby turf war again.', or one of them just stuck in the plastic tunnels. One of the Gemlings basically built an army with the other guests to take down the singing robot.

Anonymous
Actually??? The gemlings are Steven’s old half sisters, unless you mean Peri’s from Little Doses? Rose is still gonna die when Steven is born, and this AU is beyond anything I’ve actually seen in the fandom, so it’s got a lot of world building to do, and I’m just getting started! However, the kids at Chuck E Cheese’s is hilarious and might actually be a thing! Not sure yet, though.