I work for a large organization as the in-house designer. We are required to follow guidelines for our identity put forth by an external design agency that they made for us 4 years ago. However now we have certain needs that weren't considered in the guidelines. Specifically, we now have a large department that requires an identity that's more kid and family friendly rather than the very sleek and professional identity that has been put forth. My question is, is it alright for me as the in-house designer to play off the larger identity's elements and create a kid-friendly identity including a new logo? We can't hire the design agency again (they initially helped us pro-bono and we have no budget) and the original agreement doesn't say anything that covers any of this including copyright.
I saw this post but I'm not sure it really answers my question.
Any help is appreciated, thank you!