Final answer:
If Planck's constant were larger, the motion of a child's swing would be quantized with specific energy levels.
Step-by-step explanation:
If Planck’s constant were 10^34 times greater than it is, we would observe macroscopic entities to be quantized, including a child's swing. Under such circumstances, the motion of the swing would be quantized, with specific energy levels. This means that the swing's motion would only occur at certain discrete energy levels, rather than being continuous.