Write notes back & forth with your child. Leave it on their bed, when they have a chance, they write back and leave it on your bed. How neat would it be to have those notes to look back on? Wish I would have done this!
Here's a really cute idea. Frame quote bubbles, use a dry erase marker to write funny things your kids say. When you are ready to switch the quotes, have the child take a picture with their quote and make a photo book of quotes. My mom says you think you'll remember all the funny stuff they say, but you don't.