Can my 4 yr old get in free at the auto show?

I need to know if kids get in free at the I-X center Auto show. I have free tix and only have 4. I wanted to go twice and with my husband. But not if kids aren't free. Calling the IX line is not worth it, they don't answer and hang up on you. The website also has no info. Since the tix are free, they don't have this info on them. HELP! Just wanna know.