Playing animation on a blocky rig?

Trying to play an animation on blocky rig. The script gets enabled by a button (button script activates the rig script). The script does get activated but no animation is played.

local animation = script:WaitForChild("Animation")
local humanoid = script.Parent:WaitForChild("Humanoid")
local AnimationFull = humanoid:LoadAnimation(animation)
AnimationFull:Play()
print("ANIMATION PLAYING")

I get "ANIMATION PLAYING" printed.