@KarenCampe Yes, it's a term from #NumberBlocks. Here's the main episode that introduces the concept. Fifteen forms her step shape and breaks apart into the individual steps, who work together as a team to solve problems:
https://www.youtube.com/watch?v=W6i-11Flmnw

There is yet another math genius in the house and he's not even 4 yet. Kalvin, 5 times 2 equals, 10! Erm, WTH, my almost 4 year old is doing time tables! #numberblocks

@ljwrites
#BeardGrabber has been enjoying #NumberBlocks on YouTube lately. Seems to have helped nurture his interest in counting and adding up. :)