It is great to allow questions about Emunah.
It is great to teach Mechanchim how to answer those questions.
It is terrible to change the way the Seder Night which is the foundation of the transmission of the Mesorah of Yetzias Metzraim and Hashgacha Pratis, and Matan Torah, into a "proving that the mesorah that I'm transmitting is true" session. Most children don't have a kernel of doubt that you're lying, why put seeds of doubt in their minds.