Keeping your 13 month old entertained

Hayden is at the age I always think is most difficult - old enough to be mobile, but not old enough to completely understand boundaries. What do you do to keep your 1 year old entertained so they don't get into trouble? Some of our favorite things are:
- a box and smallish (not choking hazards, but some of her smaller toys) toys that she can take in and out of the box.
- books books books!!!
- Drawing on an etch a sketch
- playing catch/rolling a ball back and forth
- Stickers! She loves to pull the stickers off a sheet and hand them to me. I put them on a piece of paper or give them to the big kids to use on something :)

What are some other ideas for things that will keep a little one safe and happy?

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BethSummerville, South Carolina
About Beth
Current: Summerville, South Carolina
Birth: September 18
On Moms.com since: Aug 18, 2013
obsessed with babywearing, cloth diapering, and breastfeeding (but not judgmental about those that aren't). I'm a SAHM that works. Loves cupcakes, kittens, and glitter; hates spiders, housework and pessimism.