Practicable sound sculpture made of wicker, tufted carpet, papier-mâché and soap objects.

Like domestic furniture paying homage to the birch tree, this device broadcasts the sound of sap recorded on the trunk of the tree in spring. We discover birch pollen soap tears, the first in an ongoing series on how to make a family again with this tree's allergenic pollen. Pollen portraits, produced in the LASIRE laboratory, show us a little of their complex composition.