Toddler activities on miserable, rainy, dark days?

[breatheslowly]

What do you do with your toddlers on days like today? DD is 2.3 and currently having a nap. It will be nearly dark when she wakes up. We read, draw, paint, watch TV, she plays with her toys a bit but generally seems under occupied. Any ideas for good rainy day activities which take up decent chunks of the day?

[snowdonstreet]

More fab ideas. Thank you