I met Chip n' Dale at Hollywood Studios with my friend Colby, and let me tell you they were very playful! I had brought along a Chip'n'Dale plush and a MagicBand and their MagicBandits. Well, guess what happened? Dale was the first one to point out the plushies! I was like, "that looks like you guys!" I handed the plushies over to them (the plushies were connected by the same thing that holds clothing labels) and they play "tug of war" with the plushies. Next thing I know, Dale grabs hold of my left arm (which has the Chip'n'Dale MagicBand with matching MagicBandits) points himself out, and then I see Dale take off my MagicBand (IDK HOW the fur characters can remove one's MagicBand) and I hear a "he's so excited!" just as Dale starts to run off with it. The blueberry was like "Hey where are you going?!" to Dale. He ran off to the umbrella with it, and she says "What!? What are you doing?!" And Dale did come back, I told them that I was their "biggest fan", Chip pats Colby on the back and hugs me as Dale signs his autograph. Colby also put his Stitch hat on Chip, I do the same thing putting my Mickey hat on Dale, and he tries to fit my MagicBand to his nose! I then ask them "Any of you been getting into trouble recently?" Dale points to Chip, I said "Chip has?" Then Chip points to Dale, and I'm like "Oh it doesn't matter both of you have been getting into trouble recently!"
Now it gets to the funny part, right after the PP photographer took Colby's picture with them, Dale burped into his ear! Just as we were about to leave, Chip still had the plushes. I told him that they were mine, I got them back and the blueberry told him "Don't worry Chip we'll get your own later..."
As for Baymax, I gave him a fist bump and a hug. The overall interaction w/ Baymax was sorta meh without Hiro around just saying.