upon reading the back of the secret box set it mentions "contains Wheat" and in a couple places it mentions "compound". So I'm guessing real plants or something made from grains is contained in there too? It's just kinda weird to me. If I had to wager a bet, the translucent Dino is made out of Raw Energon or perhaps is laced full of it. I'm guessing some kinda of base you can stand the figures on or some accessories made from grains is included. It says this box contains 2 robots, Compound, 5 accessories. 1 instruction sheet.