Can anyone shed light on this play?

[playfelt]

When the three boys I had were three they did the same but they called it a garbage pile. As long as the pile got returned I let it go as much as I could but if another child wanted a toy from their pile they were allowed to take it.

[Fun&care]

It's normal. I've had kids from all ages do this in one form or another. Whether creating a pile or collecting stuff in purses or buckets, they don't actually play with the toys they just collect them...it's a kid thing I guess lol.