[May contain mild spoilers]
I used to watch The Muppet Show regularly, and loved the first movie ([[ASIN:B000ATQYTM The Muppet Movie]]). The Muppets manage to produce a blend of entertainment that is funny and engaging (and appropriate) for kids, while having another layer that makes it equally entertaining for adults.
For example, in this new installment, during one of the opening song and dance numbers, the crowd of singing/dancing people and Muppets move down a backlot city street, and they pass a hippy who looks very much like Willie Nelson, who pipes up to sing the word "high" in the song.
Now, for our toddler daughter this meant nothing (other than a funny looking guy singing), but my wife and I cracked up.
Similarly, during the finale when the Muppets are putting on a show, there is a number performed solely by chickens, and it's a cover of Cee Lo Green's song 'Forget You'. Sung by chickens. Chickens who cluck. As in, cluck you, which is remarkably close to the uncensored version of that song.
Again, that will fly over younger kid's heads, but I had to pause the movie and LOL for a bit, then rewind and see it again. Classic Muppet stuff.
And it's not just about the subversive bits, or the cameos, either. The film feels true to the sensibilities of the Muppets, and, frankly, I've been worried about them becoming assimilated by Disney and turned into...well, who knows what, but not what they were. I am happy (and thankful to Disney) to report that these are the Muppets, as we know and love them, updated for today's audiences but without losing their character or personalities.