The obstacle to the U.S. research was to uncover older children whose mothers and fathers would conform to the analyze, who experienced otoferlin deafness and who didn't have cochlear implants. Eye droppers or pipettes (we use and like both) are a favorite for many enjoyment sensory pursuits and science https://artsuppliesonline.us/products/12pcs-washable-kids-tempera-paint-set-with-brushes