Mason Jar of Hearts Hide a bunch of hearts throughout the house and have your hubby find them. When he does tell him to remember how much you love him and place them in the jar. Remember to hide the hearts in lots of random places!
A "zoo" for all the stuffed animals! Love this idea- even better than the stuffed animal hanging mesh bags! This way kids can actually get their animals out to play with them! Maybe even add a basement level for the kids to play Animals
Even in a tiny house - there's room for something like this - DIY Children Stove with Oven – Ikea Hack. Link is in a foreign language, but the picture shows it well. Cheap end table turned into toy stove. I would have loved this as a kid!