This happened to me years ago with my boys.
As women we have our periods, and have femine stuff out. Beware of what little boys will think of doing with them.
My 3 youngest sons were in the tub with there army men; they have to have something to play with in tub. Washing is out of the question for them. My Always pads were near as well as my tampons. As you can maybe guess, I go out of the bathroom for a few minutes. When I came back in my pads had became the big boats that could carry lots of men. The sunken ones were already on the bottom of the tub. My tampons were great, now really great torpedoes. "These work so good mom!" they said as they sank another ship.
Well I laughed, then cried. That was alot of money for me to lose at that time. But now it is the funniest stories about imaginations and what trouble 3 little boys can get into in the bathtub. They were around 4, 6, 7. They remember it too. Their memories were of what cool stuff mom had for them to play with, and that I must of been keeping it just for myself. Got to Love them.