Environmental scientist Actor Mark Ruffalo wants you to support Greenpeace in attacking Lego.

"Make your own Arctic protest sign with the Protest-O-Matic! http://t.co/e2FjQoENhD" — Mark Ruffalo (@MarkRuffalo) July 17, 2014

Lego has had a partnership with Shell Oil for some time and the Shell brand appears in some of Lego’s play sets. Greenpeace is now attacking Lego as a way to publicize their opposition to drilling for oil in the Arctic. They even produced a macabre “Lego Movie” of their own which has gone viral despite some legal kerfuffles.

Ruffalo’s latest tweet promotes something called the “Protest-o-matic.” It’s a slick web app where you can come up with your own protest sign for your little lego hippie and his friendly (totally not man-eating) polar bear.

Want us to chant your words at a protest this summer? Send a slogan to the Protest-O-Matic!: http://t.co/tNpnq8iYLy #BlockShell — Greenpeace USA (@greenpeaceusa) July 17, 2014

We’re guessing that not everybody’s words will be chanted at their protest.

No, no! Please no, LEGO! WATCH this video to see how Shell pollutes children's imaginations #BlockShell http://t.co/BJ5tPKP4Yv — Mark Ruffalo (@MarkRuffalo) July 9, 2014

That’s rich. Polluting children’s minds with junk science through movies, television programming, and school curricula is the bread and butter of the environmental movement. Guess they don’t like competition.