This movie was definitely more entertaining than I thought it would be. Most of the jokes did entertain me despite at times being obvious, although a few do fall flat. However, I did not enjoy the comedy involving caveman Ben Stiller (thankfully, there wasn't much of it). I think the movie would have been better without that character. The story is straightforward as expected, but still good enough to not be boring.
There are some cool scenes in this movie that really pleased my inner kid, mainly when Sir Lancelot is fighting a triceratops and a scene involving a M.C. Esher painting along with a couple of others. I did also like the ending. It was a bit sad when it came to their goodbyes, especially when it came to Robin Williams'.
Overall, it is a solid movie for kids and adults should have an alright time