J – 7 Elements
| 240. Jack Pump |
| 241. Jack-o-lantern |
| 242. Jeans |
| 243. Jellyfish |
| 244. Jet Airplane |
| 245. Jet Engine |
| 246. Juice |
K – 1 Element
| 247. Kite |
L – 15 Elements
| 248. Lead |
| 249. Lead Oxide |
| 250. Lemons |
| 251. Lettuce |
| 252. Liana |
| 253. Lightbulb |
| 254. Lighthouse |
| 255. Lightning |
| 256. Limestone |
| 257. Lint |
| 258. Liquid Oxygen |
| 259. Lizards |
| 260. Locomobile |
| 261. Loom |
| 262. Lumber Mill |
M – 31 Elements
| 263. Machine Factory |
| 264. Magnet |
| 265. Mammals |
| 266. Mammothes |
| 267. Map |
| 268. Marmots |
| 269. Mechanical Clock |
| 270. Melody |
| 271. Mercury |
| 272. Metals |
| 273. Methane |
| 274. Mice |
| 275. Microscope |
| 276. Milk |
| 277. Milk Chocolate |
| 278. Millipedes |
| 279. Mineral Water |
| 280. Minerals |
| 281. Mirror |
| 282. Moat |
| 283. Moles |
| 284. Molluscs |
| 285. Monkeys |
| 286. Mosquitos |
| 287. Moss |
| 288. Museum |
| 289. Mushrooms |
| 290. Musical Instruments |
| 291. Mussels |
| 292. Mutating Bacteria |
| 293. Mutating Plant |