I finally came up with a way that I like to keep Alexa's different toys and activities organized. I found these clear plastic chests at The Container Store on sale that are perfect. Since they are clear, Alexa can see through them and find the one that she wants to play with. Because they are zippered, they keep everything in them even if they get thrown around a bit. They are just the right size and Alexa loves carrying them around by the handles. Right now I have one with her coloring supplies and stickers, another with puzzles, one with flash cards and games, and another with misc. craft items like puffs, popsicle sticks, pipe cleaners and beads.
I also keep all of her little figurine toys in these zipper pouches from the dollar store.
Most days, these things keep her pretty occupied.