Well, I don't know how out of touch with kids the Reel Geezers are, but our grandsons (6,6, and 10) loved the movie. The twins were very aware that the over-arching theme was anti-littering. The theatre where we saw it roared with laughter, and not just during the introductory cartoon.

At the same time, we (the alleged adults in the party) enjoyed it very much, as well.