What are some underrated features of your favorite packs?

Some people will probably be annoyed at me for this one... lol!

But I LOVE My first pet stuff, I love the 6 postcards you can collect from it and add them to my bulletin board with my other cards and I especially love that my kids can study their pets as a homework assignment and it counts as having completed their homework (It's quicker than sitting down and doing homework too until you get the "breeze through homework" option. As far as I know it's the only homework alternative built into the game and I wish there were more, such as studying plants etc. Homework isn't ALWAYS book work.