Identify the characteristic of development described in this situation:
At preschool one day, Ian suddenly burst into tears. He had been given a worksheet to complete, with his friend Crary, which required him to cut out a simple picture with special scissors, paste it to another picture, and color it. Ian knew exactly where to paste the picture, he loves to paste pictures, it makes him so happy! He also loves to color and had already chosen two colors he would use. But, Ian could not complete his picture because he could not make the scissors work, which made him very frustrated. Crary told him it would be okay.