Y.A.
me and my daughter have been invited to quite a few of chucky's parties.first off the little boy was scared to death of chucky.the next year he asked to have it there again and it wasn't until the end of the party that he finally went up to chucky and gave him a hug.my suggestion is to take the little one to see chucky first.i mean a six foot mouse could be pretty scary for a little one.if he laughs and giggles at chucky then go for it, if not well then use your best judgement from there.hope everything turns out ok.