The G15 Meccanoids can be rebuilt into other forms, including a dinosaur.
Instructions for rebuilding your Meccanoid G15 (2 foot tall robot) into a dinosaur can be found here http://cdn.meccano.com/notice/15401b.pdf
Instructions for rebuilding your Meccanoid G15KS (4 foot tall robot) into a dinosaur can be found here http://cdn.meccano.com/notice/15402b.pdf