I recently came upon the realization that I really need to work on my children’s vocabulary. So one night while they were sleeping, I used masking tape+marker to label items around the house in Japanese! When they woke up in the morning, the kids had fun discovering what I had labeled in the kitchen, living room, bathroom, and bedrooms. I think this will help us learn some new words and use them in context. The labels are an eyesore, but I plan to remove them once I’m confident we have mastered the use of that word.
If you would like to do the same, just walk around your house and write down the things that your kids would not be able to name in Japanese. There may be some words that you’ll have to look up in a dictionary! Use a permanent marker to write the word on masking tape, and stick it on the corresponding item. When everyone in the family has learned the word, you can remove the masking tape.
Hiragana Mama 
I’ve heard this idea many times before but never seem to get around to it. Using tape is a good idea. Hopefully I will actually do it this time!