As I mentioned before Anna is a slide fanatic. She greatly enjoys playing on the little slides in the church nursery so we decided to get one for her to play with at home. We bought the Little Tykes Easy Store Jr. Play Slide from Toys 'R Us (and bonus it was on sale!). Anna has been on and off of it ever since we got home and it is a great way to get energy out when it is too cold to go outside. A few things I like about this slide in particular is that it folds up for easy storage, the sides are low enough that Anna can get her leg around by herself to slide down, and it is compact for use in our family room.
Here's a video my husband made of Anna enjoying her slide (minus the blooper footage from her fall :( ).