This DK children's book for ages 11-14 is brimming with exciting, educational activities and projects that focus on electronics and technology.Keep your siblings out of your room with a brilliant bedroom alarm, power a propellor motorboat, make a thermoelectric phone charger, build a set of speakers, and construct a crane by following step-by-step instructions and using affordable equipment. Tech Lab will engage budding scientists and engineers as they experiment, invent, tri