My 14-month-old daughter is currently fascinated with containers, and things that she can put in them, while just as fast taking them right out. So we found a great way to make more fun with this.
Of course I spend a lot of my day in the kitchen, whether cooking and prepping meals, cleaning up the results, or racking my brain (seriously just had to look up whether 'racking' or 'wracking' is appropriate here and apparently the jury is still out) trying to come up with some food ideas my picky-ish toddler will tolerate. So Bugga spends a lot of time at my feet, and I wanted her to be entertained so I could still be productive.
I designated two lower cabinets to my less-valuable storage containers, all plastic. All other cabinets are of course locked (and she is fascinated by the locks, by the way, but anyway...), but these two contain two large blue tubs of fun. Though it's no Tupperware, the little plastic bowls you get with your Chinese takeout have made for the most fun. I somehow have an assortment of sizes and they all fit perfectly inside each other in any order.
Bugga loves to take these containers, fill them with her little toys, and then stack them up. Then she takes them apart, drags them to the living room, stacks them up again, and puts more toys in them. Then back to the kitchen for the game to begin again. She loves it, and I'm glad that she gets to practice her dexterity, her spacial reasoning, and will even listen to directions if I ask her to "please put that bowl back in the blue bin" or whatever.
I can't wait until she's big enough to help me mix ingredients!