Turn off the TV, gaming devices, cellphones, basically any electronic device. When children spend their time reading and playing with toys, they have good attention spans and know how to be be creative.
When my little girl was a baby, the TV was off until she went to bed. Now that she's a little older, she may get to watch one show a day. Most days, we don't even turn it on.
She has an incredible attention span. As a baby, she'd want to sit and read for hours. She still loves to.