This Aliens P-5000 powerloader costume is easily the greatest baby costume that I've ever seen. It was created by Carsten Riewe, and it was made to fit both him and his 13-month-old daughter, who is strapped into her safety harness.
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.