Putting things in and out of containers

Maddie hit another "12 month" developmental milestone before reaching 12 months. We've been waiting for this milestone for a while.  She has been taking things out of a container for a while. She finally began to put things INTO a container! She will even put things into multiple containers of different sizes.

First, here is a video of her at the park. She was completely content playing with the leaves. She played with the leaves for at least 20 minutes! She placed the leaves from one side to the other, then she started to place leaves on top of the playground tube, then placing them on the ground, then back in the tube. She was so upset when we went home, she wanted to play with the leaves!  I didn't realize until now this was her developing the skill of moving things into and out of spaces.

Here is a video of her placing things into a basket. After this, she did it with 3 boxes!  I would have taken photos but my phone ran out of battery.