The material is much sturdier than other bookcases in this price range. I know the description says 3kg per shelf, but i've filled mine with hardback books and have had no issues over 4 or so years. Great bookcase and would buy again.

this is what we have used the cubby's for, so ideal for our 3-4 year olds.
our other building have the dark cubby's but they have not set those up yet.
they're awesome thanks so very much.