Fun game, needs guidance on boosts

Fun-but finding the explanation on the free boosts at higher levels is tough until it pops up for you. If you dont use it then it will explain it at some point later but only when its new to the level. Like there is a boost that protects the babies from spiders- is that for all babies in the level or do you throw it like a bubble ?

Jmillersan about Bubble Mania™, v1.8.3