Question: fun things to do with a 3 year old on a rainy day?
Answer: Make an Indoor Obstacle Course. Jump over cushions, crawl under the table and over chairs, jump on the doormat five times, then run around the table. ... 
Build an Indoor Den. ... 
Go Bowling. ... 
Walk in the Rain. ... 
Go to the Movies. ... 
Choose and Watch DVDs. ... 
Go to the Library. ... 
Have a Storytelling.