I have a interview at build a bear, and im scared because its a group interview, i cant answer questions..?

i cant answer questions right off the bat and this particular store asks for imaginative stuff and im scared ill do bad, and i dont want people to laugh at me, should i not go? what ever question i am asked, i have to think of what to say, everyone will know what to say except for me, i dont want to make a fool out of my self!