The children present asked very detailed questions about dinosaurs which delighted all in attendance. When I decided to follow Christ about 8 years ago, my first exposure to a Creation talk was an ICR Back to Genesis seminar at Calvary Chapel. John Morris was the speaker and the answer is yes, Christians do believe dinosaurs existed. The first documented fossil evidence for dinosaurs was unearthed in the 1820's. There are no missing links for dinosaurs.
Dinosaurs provide no evidence for evolution.
Dinosaurs contradict the Evolution model that life in the distant past was simpler, and became more complex over time. If dinosaurs did exist way back then, they should be simpler, not more complex than animals living today. Dinosaurs were intelligently designed. My wife and I once went to Hawaii and took a tour on volcanoes. Our tour guide was a recognized expert on volcanoes and authored the book the Parks Department published on Hawaiian volcanoes.