Bones, foam, and slime—oh my! Discover the GrossMos collectible figures! Unpack the giant hidden dinosaur head, add water, and watch as the dino starts to foam at the mouth. Open its jaws and dig out the bones to assemble a smaller dinosaur. Once you've built your dino, squeeze its body and see where the toxic green slime oozes out. Available in 4 different versions. Collect them all! From age 4.