These three videos portray a few things.
1. Poppy and Olive can both pull themselves up. (Hooray!!!)
2. Kids fall down A LOT. (It's sometimes funny.)
3. When you have multiples, they hurt each other, and the bumps and bruises increase exponentially. (See video number 1 in which Poppy lovingly bashes Olive's head into the crib bars.)
P.S. No babies were seriously injured in the making of these videos.