Although ultimately all ends well and Gru and the girls form a happy family and learn that even "bad guys" can have a change of heart, some themes/lines in the movie could be upsetting for families with adopted children. Gru initially adopts the kids (in a very easy manner) for selfish reasons, and then he actually returns them to the orphanage. And Miss Hattie says some intentionally hurtful things to the the girls (like "You're never going to be adopted. You know that, don't you?") and portrays orphanage directors as cold-hearted and unfeeling. She puts the girls in a "Box of Shame" as punishment and forces kids to do manual labor. Some crude humor, as when a minion photocopies his rear end, and some butt-shaking dance moves.
All of the violence is cartoonish and doesn't feel realistic -- though there are lots of jokes and gags about super weapons and crime, as well as one potentially upsetting scene in which a little girl is put in a "nail box" and a squished juice box briefly implies blood (but no one is hurt). The Minions "communicate" with each other through slapstick moves like punches and shoves. There's a Bank of Evil that bankrolls villains' high-concept crimes -- like stealing the wonders of the world (or, in Gru's case, the moon). Several explosions and gun violence that never quite kills anyone but does injure folks and sends a couple of characters into orbit.
Mild insults and minor swear words like "suckers," "stupid," "poop," "shoot," "butt," and "loser."
No actual products within the film, but tons of off-line marketing/licensing tie-ins, from books and apps to a wide variety of toys, clothes, home decor, and much more.