If you have an itty-bitty baby (or, Ok, a ferocious toddler), buy him or her a box of itty bitty books. Baby E makes a set, Nick Jr makes a set, and I’m sure there are others out there. M got hers from her Uncle Pat for our belated Christmas, and she seriously LOVES them. She looks at them (one little book for each letter of the alphabet). She stacks them. She takes one out, closes the lid, puts it down, opens the lid, takes another one out, repeat. 26 times. She seriously plays with them for up to an HOUR at a time. Love that.