These Lego blocks are actually storage boxes –

2 Layer Kids Building Blocks Storage Box Adjustable Lego-Compatible Storage Container Plastic with Handle Grid Toy Organizer - AliExpress

storage - Which LEGO boxes are compatible? - Bricks

These Lego blocks are actually storage boxes –

Lego Classic Large Creative Brick Box, 10698, Complete w/Manual & Bin 673419233606

How to Organize Legos: 50 Brilliant & Creative Ideas

LEGO Storage Box Just $11.98 on (Regularly $30)

A Smart Way to Sort and Store Those LEGO Sets!

CLASSIC LEGO DESIGN: Modeled after the original LEGO bricks, these are the perfect addition to any master builder's household NEAT and FUN: Encourage

Room Copenhagen 8 Lego Brick Box, Bright Yellow (40040632)

Toys Storage Organizer Bins for Lego, Stackable Toys Organizer, Lego Building Block Storage, Toy Storage Box with 24 Palace Grids, Plastic Stackable Organizer Bins (Green 3layers) : Baby

【Suitable for Various Items】The stackable toy storage box comes with 12 compartments, which can accommodate various toys and items for better

Toys Storage Organizer Bins for Lego, Stackable Toys Organizer, Lego Building Block Storage, Toy Storage Box with 24 Palace Grids, Plastic Stackable

Review: Wooden LEGO Brick Desk Drawers by Room Copenhagen - BRICK ARCHITECT