[She considers briefly before carefully raising her hand to her shoulder, giving him a chance to walk to it on his own. Her hair is soft and loose, so that's also available for him to grip if he needs to maintain his balance.]

I don't want to trip and hurt you by accident.

[...Wait. She frowns.]

...Can I hurt you? Like, do you feel pain when someone holds you too tight or shakes you or something? [While Vanya was not exactly swimming in toys when she was a kid (it was literally just Mr. Snuggles), she knows that children aren't always very gentle with their things. He seemed very excited about the idea of being owned and loved by a child, though.]