One of these things is not like the others

Tonight's dinner consisted of a few grilled items - hotdogs, brats and burgers - brought to us by my neighbor. When the kids came in, I asked one by one who wanted what.

"Aiden, do you want a hamburger, hotdog or bratwurst?"

"Hamburger!"

"Dawson, what would you like?"

"A hotdog please."

Then Max chimed in, "I'll have chips."