Need some ideas for twins' second birthday

So I know it's crazy far in advance, but I love planning parties for my kids. I always try to start as early as possible so I can pick up things as I see them in thrift stores and on clearance. My twins had their first birthday party in November and we did a "Winter ONEderland" theme. Since they are twins, two babies, and turning two, I was hoping to think of some cute pun theme to work with like we did with the first one, but I can't come up with anything. Just wondering if anyone out there had any ideas Also, they are two girls