Use broad categories
Blocks, art supplies, books and dress-up items are easier than many tiny groups.
Put daily items within appropriate reach
The system should support safe independence.
Use pictures with words when useful
Visual labels can help younger users.
Rotate instead of overfilling
Some items can be stored elsewhere and rotated if room capacity is limited.
Practical boundary. Measure first, respect product load limits, and do not improvise wall, ceiling or overhead installations when the structure or appropriate hardware is uncertain.