A parent in Germany created this robo-suit--the P5000 Powerloader from "Aliens"--for his 13-month-old child. Here, according to the YouTube description, is how it was done:
This Baby costume was inspired by the Caterpillar P5000 Powerloader from the movie "Aliens" by James Cameron. The arms and legs are full moveable and the top-light and LED were powered by an 12 Volt battery pack stored in the backpack. The on/off switch is in the left arm. Also in the backpack a Bluetooth boombox ist installed to play mechanical robot sound fx or music if preferred. It took 100 working hours to finnish the costume and I built it for the "Karneval"-Parade in my hometown in Germany February 2014 . My 13 months old daughter enjoyed to be carried and moved in her harnness savely.
We await news of the world's unconditional surrender. Also, apparently someone else did this, too? It may already be too late.