4M – SPY SCIENCE – INTRUDER ALARMLearn the science of connecting an electric circuit. Construct your own door buzzer and place it behind your door. Stop intruders from your room. It’s cool and fun!. SKU: 3246 Categories: 4M, Kids Labs Description 8+Related products 4M – GROW A MAZECan a plant find its way through a maze?. It sounds impossible, but just watch as plants find their way through a maze that you design. You can even watch the roots develop inside the transparent soil container. It’s a mini root watcher too. 4M – KITCHEN SCIENCEPerform amazing kitchen experiments with everyday materials. Generate electricity by using a fork and a lemon. Launch a rocket fueled by baking soda and vinegar, Build a table top volcano which erupts with bubbly lava. 4M – TYRANNOSAURUS REX SKELETONContains a cardboard display platform with fun facts, a tyrannosaurus rex skeleton about 19cm tall when assembled.