Orthomodular lattices are a bit complicated, but think of it like building a tower of blocks.
First, you start with a base block, which is like the smallest element in the lattice. Then, you can stack more blocks on top, but they have to be placed in a specific way.
Imagine each block has a different shade - some are light and some are dark. You can stack a light block on top of a dark block, but you can't stack a dark block on top of a light block (they won't fit). This is like the rule in an orthomodular lattice where you can have the combination of two elements but they satisfy certain constraints like light on a dark.
But, it gets a bit more complicated. You can also think of some of the blocks as sort of special "switch" blocks. These "switch" blocks can flip the position of other blocks, so a light block becomes a dark block and vice versa.
In an orthomodular lattice, some elements have this "switch" property, and there are rules for how they behave when you stack them with other blocks.
Overall, an orthomodular lattice is like a tower of blocks with special rules about how you can stack them on top of each other and some blocks with a special "switch" property. These rules are important for understanding certain mathematical topics like quantum mechanics.