This item is an incomplete science kit by Home Science Tools.
It includes five black trays, four clear plastic trays, and a heart dissection instruction manual.
The clear trays measure 7"x 7" square with a depth of 1/4". The black trays measure 10.75"x 9.25" with a depth of 1/8".
This kit is great for any girl or boy interested in science.
These items come in well-used condition with paint marks on the backsides of the black trays, scratches, and scuffs around the edges, and scratches on the clear plastic tray from previous use.
These trays will still provide hours of learning.