My Imagination is a Garden

Unfortunately, it sometimes seems as though it's trapped behind a fence, on private property.

Last night, as I was falling asleep, I came up with a melodic drum sequence. Each beat had a different note and depth, imagined on different types of drums, creating a wonderful, repetitive melody.
Do the drums in my mind even exist in the physical world?
I imagine scenes and drawings that are beautiful, and beyond the ability of my meat-self to make a reality.
Sometimes the distance between the creativity possible in my imagination and the reality of physical limitations seems impossible to traverse.
I find it a fascinating, discouraging, wonderful part of being alive.