Crash: Mind Over Mutant - Evil Public School Dolls

Thanks to Smaz for providing this guide and the descriptions and images that follow.

Doll #1:

On the side-on section on the path to Evil Public School 101, you will need a Rhinoroller. Boost up the first curved walls and to the top. Head left to find your doll.

Doll #2

You will need a TK for this. Keep the Rhinoroller and boost to the top floor of the separate floor sections, whenever you can. Once up, switch to the TK in order to pull some icicles down from the ceiling, to use as platforms to jump across. Switch back to the Rhinoroller in order to jump across the platforms and keep on the top floor, without falling down the gaps, and head right to eventually reach the Evil doll. It sits above a bouncey platform.

Doll #3

Outside the Evil Public School sits some very large crates to the right. You can either climb them, in order to reach the doll, or store your mutant/titan in order to leap high enough to obtain it (if you have only one, anyway).