Sun Conure doesn't play with toys

Hello, I just adopted a 1.5 year old sun conure.
She is very friendly and loves to be handled, petted, scratched. In only 3 days, i was able to teach her to turn around on her perch, to nibble on a target, and we are now working on the upside-down bat.

However, up to now, the bird was kept in a cage with almost no toys. And now, even though I put a few in there, she does not play with them. I did try to integrate being with me + playing into a single activity by putting one of the toys outside of the cage, almost on my lap, and then she did walk on it and nibble on it. However, while she is alone (all day while I am at work) all she does is eat and sit on a perch. She did not play at all. I have a web-cam setup to spy on her so I know this.

Could something be wrong? Is there another technique I can try to get her to learn to entertain herself?

Thanks,
Dana