We took our 5-year old Grandson. He had a BLAST!! The whole show is very interactive and entertaining. The motorcycles might have been the most impressive. He did correct everyone that the fire-breathing dinosaur is actually a dragon because dinosaurs don't breathe fire. LOL
Things were a little slow in between trucks, but all in all it was a lot of fun. We went for him, not us, but we enjoyed it too.
Caution to adults and kids - it is VERY LOUD!!! They sell earmuffs for the kids at the merch table, but if you already have some bring them. Bring something for yourself, too. I saw a few families leave with crying kids not long after it started. I'm going to assume it was too loud for them.