Question: fun things to do on a rainy day inside?
Answer: Indoor Treasure Hunt. Hide things around the house for your children to find.
Indoor Camping. Build a pillow or blanket fort and do fun activities inside them.
Paper Airplane Launcher. ... 
Cardboard Tube Marble Run. ... 
Plastic Bottle Bowling. ... 
Bean Bag Toss. ... 
Tornado in a Jar. ... 
Homemade Sensory Bin.