This box is high, which prevents the grains bounce out of the box. The release cover is convenient for carn pop mix with salt or sugar. This cover also allows for easy wash the box: water and a little detergent, the box is closed, shaken well and is clean after rinsing.
The cover is a bit difficult to put on and remove. I think a child may have difficulty handling. Given the size of the box, it is in any case not intended to be handled by children.