"I minted you," Elspeth murmurs to him, sending a notice to the Joker that he's got a new alt he could choose to entertain because she's busy and teleporting herself and her ward to their living room in Québec. "And stuck it on."
"You can talk to Sue, when you're ready. He knows how to move like that controllably and it's possible he could teach you."
She conjures up a little two-sided fountain for the poof. She doesn't know when it last drank or how often it needs to. She sets it aside. She hugs Harley.
She doesn't burden him with the effort of deciding what. She produces a sandwich with approximately everything on it, the kind of messy thing he'd make on lazy afternoons when sandwiches were called for, and holds it out for him.
Elspeth patiently deploys triangles where triangles will be useful. When the sandwich has been used as thoroughly as possible she chooses something neater to follow it up with. (Apple slices, devoid of complications such as apple core.)
And Elsie holds him, and when they are gone, she supplies cookies. (Soft cookies that won't get crumbs everywhere if they are clumsily handled.)
[Sue's free to attempt porting lessons,] Jane tells them both, after considerable time has gone by.
"...Should I know what's going on or am I just here to be a lap?" asks Elsie softly. (She is fine with being a lap. She signed up to be a lap sometimes.)
"I'm pretty resilient. If it would be good for me to have it I'll take it, that way or judgesight-wise, whatever."