How to learn shape recognition?

Rather than how to learn or teach shape recognition, this post is more about how A learnt shapes. A learnt basic shapes at 15 months. and now at 16 months she knows many more shapes. We were initially using this shape board from little genius (at around 14.5 month)

Little Genius Inset Shape Board (Small) with Knob

She learnt these in a day or two but later I realized that its not shapes that she identifies but either color or position.
For eg: If I would say circle, she will pick circle. But if I drew circle and square on a notebook, she couldn't figure out which was circle. 

So here we were. I had no clue what association she had formed in her developing mind because of which she would identify shapes correctly on the shape board but not else where. I just left doing it for some days and was thinking how do I get her to have the correct association between shape and shape name. What was troubling me more is that she has made some wrong association in my mind. I feel unlearning stuff is tougher than learning it. That is why I didn't want her to learn it wrong.

Long back I had bought

Fisher-Price Tappy The Turtle Rattle  (amazon link)

Fisher-Price Toddlerz Tappy the Turtle  (flipkart link)

for her. But she wasn't interested as  the shapes were to hard for her to press and she somehow never found it interesting earlier. Now when I gave this to her, every time she would pres all the shapes, turtles neck would come out and it would make a funny sound. She used to burst into laughter. Now when she was pressing the shapes, I started telling her the shape names and slowly she correlated it with the shapes learnt from
Little Genius Inset Shape Board (Small) with Knob  .

Now when I drew the shapes on the notebook... Voila! she could tell them correctly.

I also kept them side by side and asked to press circle on turtle and pick circle from shape board. Just in a few days she learnt shapes and this time shapes are actually shapes and not some position or color :-D . Please do share how did your kids learn shapes.