Hi Lindsay,
I’m a Disability Services professional in Boston. In our LSP sessions with participants who are blind/low vision, I’ve made available the following:
Small white plastic bowls do Window Exp bag sorting.
One or two LEGO plates with one item of the full array of LEGO bricks and elements affixed (not glued)to the plate:it becomes an inventory sheet.
Several 12 inch rulers: they become supporting tools for building, collecting, sorting, separating, sizing and finding.
White 8×11 sheets of paper become the building area for individual builds.
You may also create an orientation audio recording that describes/verbalizes the metaphor making component of LSP, the inventory, the written and the materials, to be shared in advance of the session with the blind participants. You determine what content is too much of a spoiler and would compromise the process.
Above all else, ask the participants what may be an effective accommodation or modification of each task. Give explicit permission to the group members to ask each other for help.
Ask for modification feedback at the end of the session. Perhaps you could share that feedback with us at a later point as a case study.
I can be reached at crobin@bu.edu for further discussion. This forum is also good.