So this isn't really a craft, but since I used it to entertain my 16 month old the other day, I thought I'd share.
Toddler Entertainment Supply List: 6 paper towel rolls, 1 or more 6 pack holders, curious toddler
I started by showing her how they fit in the holes. Then I sat back and watched her figure out how to get all 6 in the container.
Success! No sooner had she figured it out, than she lost interest and moved on to playing with Cole's stickers. At least it kept her busy for a little while.