The artwork above is a demonstration of Pointillism (somewhat), which uses the Gestalt Principle of Similarity. In this case, instead of many dots, rather, the artwork utilises a variety of school photos from CGGS.

In this case, this is just a set of lines that curve a bit, however, it is often perceived as a stem with some leaves on it

Here, the logo could be seen as multiple crafting tools, however, as a whole, the tools and shapes spell out Makerspace.