A crappy thagomizer(?) with a double pendulum tail made of old robot scrap from:

Mr. Stabby knife (3lb)

Hammer Hugs arm (3lb)

Chimpansmeeeeeeeeeeeeeee banana forks (3lb)

We're gonna need a bigger frog drive pods (3lb) (thanks Charlie)

Wedge from Free Head Pats >:3 mini bot / Barney the Bloodthirsty (30lb/1lb)