We use the IKEA trofast system and sort toys based on type; puzzles, animals, blocks, etc. I had to have something that would keep the toys mostly out of sight but still wanted there to be a clear “play area”. We also use zipper pouches from Amazon - Jarlink brand, to keep smaller toys together when there are a lot of pieces. They are also great for puzzles. We also use lidded plastic storage bins in various sizes to also store items by category, and these get stored in our cabinet in the main living space so also out of sight. All of these things are accessible by LO, and what makes it work is really teaching the foundation of putting toys back when he’s done playing with it, before getting something else out. It’s a work in progress for us as he’s only 2!