take a stack of about 25 of them & start laying them out- turning them this way & that- you will be absolutely amazed with all the different designs you can come up with- zig-zags, stars, just all kinds- i think a hst is one of the most versatile block out there- there are whole books dedicated to using them-
we have a bag of them (i think about 200) that for the past 10 years my kids, nephew, grandkids will pull out & (play) with laying them out & challenging each other to come up with new ways - they are a fun design tool and can occupy us for literally hours.