Bulky, difficult to open, finally bit attractive

I was seduced by this pretty box shapes at first, because it is original shape with various holes (for geometric shapes, but also shapes of animals), many color to sort by color and learn to recognize, but eventually the girls played very little there, because the locks are particularly difficult for children to open (at least mine, 2 and 4 years). So, despite all the appeal of the toy, they eventually get worked over and put it aside. The opening is difficult because you need to insert the key and then push and turn at the same time slightly to the side (but very little, which made it difficult to truly engage the key), and finally pull the door. Too complicated for a small in my opinion. In short, unfortunately, I do not recommend it, although I appreciate the house forms boxes with a bunch of keys, that remind me of my childhood ...