The other children also jumped up all attention.

不明白句子中的 jump up all attention 是什么意思。

句子出自2020年新高考全国卷（山东卷），原文上下文为：

For some moments, John said nothing, but, suddenly, he sprang to his feet and cried, “I have a great idea! I have a solution that we can all help accomplish (完成).

The other children also jumped up all attention. When John had an idea, it was sure to be a good one. “I tell you what we can do,” said John. “You know that big box of corn Uncle John sent us? Well, we can make popcorn (爆米花), and put it into paper bags, and Bernard can take it around to the houses and sell it.”