Nothing will beat the first film. The originality fades with most sequels. Unfortunately this is more the rule rather than the exception. For the same reason, I hope they don't bother to create another "Rango". That was another fun and brilliant animation in my opinion. Kids will like it and by all means don't avoid it. Just don't have high expectations.
Some material may not be suitable for children under 10. These films may contain some mild language, crude/suggestive humor, scary moments and/or violence. No drug content is present. There are a few exceptions to this rule. A few racial insults may also be heard.