Have you checked your husband's closet lately? My friend recently counted no less than 70 T-shirts in her husband's overflowing closet! Mainly gifts from sponsors.
Most had never been worn because they're the kind of T-shirts you don't want your husband to be seen with outside of the house.
Here's a fantastic project for rainy days, to make good use of them: a knotted rag rug. Perfect screenless option for bigger kids who don't want to do a puzzle.
It comes from the blog chawedrosin.wordpress.com where they teach you:
1) How to cut an old t-shirt
2) How to tie knots and link sections together