Trinaryblocks Actual Base-3 in Trinary Numbers. Like 1, 2 & 10 as Base 3 (Decimals from 1, 2 & 3). Examples: 3 => 10; 9 => 100; 28 => 1,001.
Credit to @VectorWorkshop2, @HTPC19512, Numberblocks, Cbeebies & BBC.