Benchmark 12C
Habits of Mind: Manipulation and Observation
Grades K-2, page 293

Make something out of paper, cardboard, wood, plastic, metal, or existing objects that can actually be used to perform a task.

NSES Content Standard E 
Science and Technology: Abilities of technological design
Grades K-4, page 137
Implementing proposed solutions. Children should develop abilities to work individually and collaboratively and to use suitable tools, techniques, and quantitative measurements when appropriate. Students should demonstrate the ability to balance simple constraints in problem solving.