Electricity Master Lab experiment kit, 10+, STEM interested suits best! Serious kit!

Electricity Master lab Experiment kit, Thames & Kosmos, aged 10+ but will challenge much older- even adults too! Only opened, I will fully guarantee ALL parts present, immaculate, full detailed Manual ( videos also available); this will provide hours of fun- and sometimes frustration!/ to interested children/adults. Ideal introduction to Engineering, STEM etc. Bought 2 years ago in the hope of getting our 12 yr old interested in same, but not to be as Sport his big thing! As new. Impeccable. Selling way way below cost price, reducing to move it from 55 euros to 45 euros . As per photos. Thanks.