toddle (蹒跚学步).

Examples

Leonard: Sheldon, this was your idea. A little extra money to get fractional T1 bandwidth in the apartment.
Sheldon: I know, and I do yearn for faster downloads, but there’s some poor woman is going to pin her hopes on my sperm, what if she winds up with a toddler who doesn’t know if he should use an integral or a differential to solve the area under a curve.