我正在照看三个学步儿童。

I was looking after three ___toddlers.

这些为有学步儿童的母亲举行的会议应该比每月一次更频繁。

These meetings for mothers with ___toddlers should take place more often than once a month.

这个游乐场专为学步儿童设计，以确保他们的安全。

The playground is designed specifically for ___toddlers to ensure their safety.