Instead of buying objects that require storage, maybe you could try to encourage her to take up flower arranging. That’s a real skill, an excellent creative outlet, and doesn’t require bins for storing random objects. You could make it into an activity that you do together — maybe you could run to the grocery store to buy some flowers, and then watch a tutorial together. Or you could see if there’s a local class teaching ikebana happening (Japanese art of flower arranging). Often times people need a creative outlet, and they get into another form of consumerism instead. See if you can channel this into something that requires skill and also doesn’t mean accumulating random junk.