Potato Clock jigsaw puzzles you hear a loud cracking

you hear a loud cracking sound coming from the dinosaur exhibit

Our 100-piece puzzle has extra-large

and more activities to help bust even the most unbeatable boredom

Squeeze-activated squeaker adds an extra element of surprise

Potato Clock jigsaw puzzles you hear a loud crackingThe 4M Potato Clock teaches young minds the value of green energy in an illuminating way. The Potato Clock uses a pair of ordinary spuds to power a digital clock. This kit includes a digital clock, wires and prongs; two potatoes are all that's needed to create a working clock. This kit is ideal for young science enthusiasts, and offers a valuable lesson on the transformative power of green science. Detailed assembly instructions included. No batteries